The AquaDom in Berlin, Germany, is a 25 m (82 ft) tall cylindrical acrylic glass aquarium with built-in transparent elevator. It is located inside the Radisson Blu Hotel in the DomAquarée complex at Karl-Liebknecht-Straße in Berlin-Mitte.
The DomAquarée complex also contains offices, a museum, a restaurant, and the aquarium Berlin Sea Life Centre. It was opened in 2004.
The outside cylinder was manufactured on-site from twelve sets of panels sent from the factory; the inside cylinder for the elevator was installed as one piece after three sections of 5 panels each were bonded together next to the hotel.
The Aquadom is the largest (by volume) acrylic cylindrical aquarium in the world, with a diameter of about 11 m (36 ft) and a height of about 16 m (52 ft), resting on a 9 m (30 ft) tall foundation. Filled with 1,000,000 l (260,000 US gal) of water, it contains over 1,500 fish of 50 species. The feeding of the fish and the cleaning of the fish tank is performed daily by 3-4 divers.
According to en.wikipedia