The largest free standing aquarium in the world resides in a hotel lobby in Berlin. Here’s a way to feel a part of the marine life – ride the transparent elevator up through the middle of this 25-metre-high glass aquarium. An elevator takes guests up through the inside of the tank for a full 360-degree view of the fish as well as the divers who care for them and the tank on a daily basis. An attraction of the Berlin Sea Life Centre, the AquaDom is the largest cylindrical tank in the world and has more than 1,500 fish of 97 different species swimming in over 1 million litres of water.