La tour de Belém évoque l'Afrique en plein Lisbonne. Sous ses terrasses, ses balcons et ses échauguettes mauresques, cette citadelle, édifiée au XVIe siècle par Arruda pour abriter les capitaines du port, a vu passer les caravelles en partance pour les côtes de Guinée.
Lisbon (/ˈlɪzbən/, LIZ-bən; Portuguese: Lisboa, IPA: [liʒˈboɐ] or [liʒˈβoɐ]) is the capital city and largest city of Portugal with a population of 547,631 within its administrative limits on a land area of 84.8 km2 (33 sq mi). The urban area of Lisbon extends beyond the administrative city limits with a population of over 3 million on an area of 958 km2 (370 sq mi), making it the 11th most populous urban area in the European Union. About 3,035,000 people live in the Lisbon Metropolitan Area (which represents approximately 27% of the population of the country). Lisbon is the westernmost large city located in Europe, as well as its westernmost capital city and the only one along the Atlantic coast. It lies in the western Iberian Peninsula on the Atlantic Ocean and the Tagus River.