The Lisbon Oceanarium (Portuguese: Oceanário de Lisboa, pronounced [osi.ɐˈnaɾi.u ðɨ liʒˈβoɐ]) is an oceanarium in Lisbon, Portugal. It is located in the Parque das Nações, which was the exhibition grounds for the Expo '98. It is one of the largest indoor aquariums in Europe and approximately 1 million people visit each year.