Dazzling clownfish, scary sharks, crawling spider crabs, and quirky seahorses are just some of the 5000 creatures inhabiting this small but interesting aquarium. Discover the ethereal dance of the jellyfish and observe the eagle rays on your way to the Aquadom, a 16m- (53ft-) tall cylindrical tropical fish tank that can be viewed from a slow elevator. Daily 10am–7pm. €17.95/14.50; discounts when booking online; under-3s free. Combined Berlin Dungeon, Madame Tussauds, and Legoland tickets available.