Avilés is the name of the third most important city of Asturias, Spain. It is also the name of the municipality which includes the city, which is one of the smallest in the Principality of Asturias. Its length from north to south is 7.5 km, and from east to west it is 6.25 km, giving a total area of 25.34 km². Its main urban centre occupies the flattest land in the municipality, in a land that belonged to the sea, surrounded by small promontories, all of them having an altitude of less than 140 metres. Situated in the estuary of Avilés, in the Northern Central area of the Asturian coast, west of Peñas Cape, it has an important national seaport and industrial city. It is close to popular beaches such as Salinas.