In the lobby of the Radisson Blu Hotel in Berlin you can see the world’s largest cylindrical aquarium – “AQUADIV» (Aqua Dom). Its diameter is 11 meters and the height of the glass is only – 16 m. Total weight of glass – about 150 tons. Inside the tank ther is a transparent elevator with a capacity of forty people and hiking tourists on the observation deck. The aquarium have about 2,000 different kinds of fish swimming at different depths. For their feeding and cleaning the aquarium divers are used. Its really unique check out….