Portugal, officially the Portuguese Republic, is a country in the Iberian Peninsula in Southwestern Europe. Featuring the westernmost point in continental Europe, to its north and east is Spain, with which it shares the longest uninterrupted border in the European Union; to the south and the west is the North Atlantic Ocean; and to the west and southwest lie the Macaronesian archipelagos of the Azores and Madeira, which are two autonomous regions of Portugal. Lisbon is the capital and largest city, followed by Porto, which is the only other metropolitan area.