Lisbon
Lisbon (; , ) is the capital and the largest city of Portugal, with an estimated population of 505,526 within its administrative limits in an area of 100.05 km. Its urban area extends beyond the city's administrative limits with a population of around 2.8 million people, being the 11th-most populous urban area in the European Union. About 3 million people live in the Lisbon Metropolitan Area (which represents approximately 27% of the country's population). It is mainland Europe's westernmost capital city and the only one along the Atlantic coast. Lisbon lies in the western Iberian Peninsula on the Atlantic Ocean and the River Tagus. The westernmost areas of its metro area form the westernmost point of Continental Europe, which is known as Cabo da Roca, located in the Sintra Mountains.
Lusitanian Basin
The Lusitanian Basin is located on both mainland and continental shelf of the west-central coast of Portugal. It covers a 20,000 km area and extends from south of Lisbon, the capitol of Portugal, to Porto. This north-south oriented Atlantic margin rift basin is approximately 130 km wide and 340 km long and belongs to a family of periatlantic basins such as the Jeanne d'Arc Basin. To the east of the Lusitanian Basin lies the Central Plateau of the Iberian Peninsula and a marginal horst system lies to the west. The Alentejo and Algarve Basins connect to the southern end of the Lusitanian Basin. In the north, it is connected to both the Porto and Galicia Basins via a basement ridge.