The southwestern limit of Lisbon, Belém is delimited by the Tagus estuary to the south, the margins of the Algés river and the IC17-CRIL highway, to the west, until the northern limit of the A5 highway). In addition, the Alcântara river and the former eastern limits of the parish of São Francisco Xavier, until the Estrada de Queluz (Road of Queluz) reaches the A5 highway.
In addition to the historical buildings and avenues, Belém is the location of the Jardim do Ultramar (English: Overseas Garden), several blocks of green-spaces that includes the gardens of the Praça do Império (English: Imperial Garden), the Jardim Vasco de Gama (English: Vasco de Gama Garden), Afonso de Albuquerque Square and Jardim Agricola Tropical (English: Tropical Garden Museum). These gardens cover a large portion of the waterfront area, encircling the buildings of the Rua de Belém, and backs onto the gardens of the Palace of Belém. Also in Belém it's located the extreme southwest section of the Monsanto Forest Park.