Berlin mimics Las Vegas at the new Radisson SAS, where a spectacular 82-foot-high aquarium dominates the lobby. The glass elevator zips through the tank, allowing for close-ups with its 2,500 fish. The 427-room hotel opposite Museum Island even advertises more than 100 “ocean-view rooms” facing the aquatic masterpiece (800-333-3333, www.berlin.radissonsas.com).
— E.G.