A must-see attraction of the city of Lisbon is certainly the Oceanarium. It has about 8,000 species of animals and marine plants such as bull sharks, penguins, seahorses, but also coral reefs and rainforests. The aquarium is located inside the Park of Nations (Parque das Nações), residential area of the city. To size the Oceanário de Lisboa is second only to the Aquarium of Valencia. The central basin is home to species living in the oceans and along the other side tanks brings together in a single environment ecosystems of all the world's oceans.