In the city's old harbor, the Port Vell, Aquarium de Barcelona is the world's most important marine leisure and education center dedicated to Mediterranean undersea life....

Explore Barcelona at your own pace and get up to 40% off attraction admission with the Go Barcelona Explorer pass. Choose any 2, 3, 4, 5, 6 or 7 activities from a list of over 30 top attractions and tours. See some of Guadí’s architectural masterp...