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Visitors arrive at the giant hangar that houses the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach as a hot air balloon passes nearby at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors slide down the water slide at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge on a deck that overlooks the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors swim in the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A young girl slides down the water slide near the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors wait in line for refreshments at a bodega at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Live flamingos stand in their enclosure at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A young visitor looks at live flamingos standing in an enclosure at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors walk past a miniature recreation of Angkor Wat at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors walk past a cottage for overnight guests at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors explore the Tropino children's adventure park at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A live, free-flying canary stands on the deck at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors swim in the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A waitress clears tables at the Thai House restaurant at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A maintenance worker walks past tents used for overnight guests at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors look down from a deck above the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Evening descends on swimmers in the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors swim in the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

People wait to depart after spending a day at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors walk past the "Alcantara Canyon" that includes lockers and rooms for overnight guests at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors swim in a lagoon at the Tropical Islands indoor resort as cottages for overnight guests are visible behind on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors walk among the Thai House (L) and other restaurants at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors ride innertubes down a waterslide at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors swim in the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors swim in the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors walk past a cottage for overnight guests at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A visitor looks at a display of tropical insects and spiders at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Evening descends on the beach of the "South Sea" at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors explore the Tropino children's adventure park at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors swim in the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Young visitors stand under a palm tree at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A visitors enjoys an ice cream near the lagoon at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A couple from the east German city of Chemnitz lounge with their son at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A young boy rides in the basket of a balloon as he looks down at the Thai House (L) and other restaurants located in the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors ride inner tubes down that water slide at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach as a hot air balloon passes overhead at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Visitors lounge at the "South Sea" beach at the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

Evening descends on the snow-covered surroundings of the giant hangar that contains the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A worker drives a forklift through the warren of passages under the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A worker walks among tanks that filters water for tthe swimming pool under the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)

A worker walks among tanks that filter water for the swimming pool under the Tropical Islands indoor resort on February 15, 2013 in Krausnick, Germany. Located on the site of a former Soviet military air base, the resort occupies a hangar built originally to house airships designed to haul long-distance cargo. Tropical Islands opened to the public in 2004 and offers visitors a tropical getaway complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, sauna, adventure park and overnights stays ranging from rudimentary to luxury. The hangar, which is 360 metres long, 210 metres wide and 107 metres high, is tall enough to enclose the Statue of Liberty. (Photo by Sean Gallup/Getty Images)