If you want to stay in the Olivais district of Lisbon, Lisbon Airport Suites is a good choice located, around 10 minutes by car from Oceanario de Lisboa Oceanarium.
250 m from Olivais tube station, the apartment is a short way from the Quinta Pedagógica dos Olivais. The moorish Castle of Sao Jorge is approximately 6 km away.
The nearest airport is Humberto Delgado, 5 km from Lisbon Airport Suites, and Avenida Marechal Gomes da Costa bus station is merely a 5-minute walk away.