Next to the London Eye on the Thames South Bank, the Aquarium is home to over three thousand species of sea creatures and 50 tanks containing two million liters of water. Deep underground, it has 14 different zones including an ice adventure with penguins, Nemo's coral reef, a glass tunnel under the sea and a seadragon kingdom (did you know that male seahorses are the only male animals to give birth?). Open Monday to Sunday from 10 am to 7 pm.