Placed at the lobby of the Radisson SAS Hotel in Berlin, the 25 meters high AquaDom is the largest cylindrical aquarium ever built. Filled with about 900,000 liters of seawater, it contains some 2600 fish of 56 species.
The AquaDom was opened in December 2003. It cost about 12.8 million euros. The acrylic glass cylinder was constructed by the U.S. company Reynolds Polymer Technology. The outside cylinder was manufactured on-site from four pieces; the inside cylinder for the elevator was delivered in one piece. The Aquadom is the largest acrylic glass cylinder in the world, with a diameter of over 11 meters, built on a 9 meters tall concrete foundation.







