The city occupies an area of 84.8 km2 (33 sq mi), and its city boundaries, unlike those of most major cities, are narrowly defined by historical center. The rest of the urbanized area, known generically as Lisbon, are actually several administratively defined cities, such as Amadora, Queluz, Agualva-Cacém, Odivelas, Loures, Sacavém, Almada, Barreiro, Seixal and Oeiras, and that make up the larger administrative unit, the which are in fact part of the Lisbon Metropolitan Area.
The westernmost part of Lisbon, is occupied by the Parque Florestal de Monsanto (English: Monsanto Forest Park), an 10 km2 (4 sq mi) urban park, that occupies 10% of the municipality of Lisbon, considered one the largest in Europe.