Dive down deep beneath the Thames and submerge yourself in one of Europe's largest displays of aquatic life. Opposite Big Ben, the London Aquarium is the only place in the capital where you can come face-to-face with two-metre long sharks. Also discover the world's most venomous fish, gaze at the mysterious seahorses and meet our frenzied piranhas. Friendly rays are waiting to be stroked, while those brave enough can even touch our starfish and crabs.