The largest aquarium in Europe, with around 45,000 animals from 500 species across nine themed habitats — Arctic, Mediterranean, Tropical, Antarctic, Red Sea, and so on. Highlights include the underwater tunnel through the shark pool, the beluga whales, and the walrus tank, plus a 26-metre dolphin pool with regular shows.
It is a major operation and an entire half-day, not a quick visit. The white roof of the main entrance hall is a 26-metre concrete shell designed by Félix Candela, the Spanish-Mexican shell-roof master who collaborated with Calatrava on the wider complex. Buy tickets online to skip the queue.