The striking building designed by architect Félix Candela as part of the City of the Arts and Sciences houses the largest aquarium in Europe. It is actually a complex of several buildings, each dedicated to one of the earth's most important marine ecosystems and environments: Wetlands, Temperate and Tropical, Oceans, Mediterranean, Antarctic, Arctic and Islands, and the Red Sea.

More than 500 different marine species are represented by 45,000 sea creatures, visible in nine towers that allow viewing as though visitors are underwater. The most dramatic of these is the tunnel, where visitors walk surrounded on both sides and overhead by swimming sharks. 

Elsewhere are beluga whales, sea lions, walruses, penguins, seals, sea turtles, and dolphins. Along with watching the sea life, you can experience mangrove swamps, marshlands, kelp forests, and other wetland environments with their native plant species. You can also dine in an underwater restaurant surrounded by a giant aquarium.