The Oceanário de Lisboa (Lisbon Oceanarium) is not fully included for free with the Lisboa Card, but it does offer a 15% discount to cardholders. While the Lisboa Card provides free access to over 35 major attractions—such as the Jerónimos Monastery, the Belém Tower, and the Santa Justa Lift—the Oceanarium is a privately managed entity and typically only participates via a reduced entry fee. To claim this discount, you must present your valid Lisboa Card at the ticket counter when purchasing your entry. Given that the Oceanarium is consistently ranked as one of the best in the world and is a major highlight of the Parque das Nações district, many visitors find the 15% savings worthwhile even if it isn't a "freebie." If you are planning a visit, it is often best to combine your trip to the Oceanarium with other nearby sites that are covered by the card, such as the Pavilion of Knowledge or the public transport needed to get there, to maximize the overall value of your pass.