Portugal, officially the Portuguese Republic, is a country in Southwestern Europe. It is a unitary republic comprising mainland Portugal, located on the southwestern of the Iberian Peninsula and bordered by Spain to the north and east, and the archipelagos of Madeira and the Azores in the Atlantic Ocean. The country has a population of over 10.7 million, and Lisbon, its capital, is the largest city. Portugal's internal waters and territorial sea together account for two-fifths of its territory, and its exclusive economic zone is one of Europe's largest, while its terrain contains a diverse range of landscapes and regional climates.