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You’ll never guess what is inside this giant disused aircraft hangar in Germany.The hangar that is 360 m (1,181 ft) long, 210 m (689 ft) wide and 107 metres (351 ft) high has been turned into an unbelievable indoor resort with human-made habitat. 29,000 tropical plants make an artificial rainforest. Exotic birds live there and natural rainforest sounds are broadcast through hidden speakers. There is also a beach, a waterpark and an artificial sun. Tropical Island Resort complex has a constant air temperature of 25 °C (77 °F) and is open all day, every day of the year.