Spain occupies 85% of the Iberian Peninsula, which it shares with Portugal, in southwest Europe. Africa is less than 10 mi (16 km) south at the Strait of Gibraltar. A broad central plateau slopes to the south and east, crossed by a series of mountain ranges and river valleys. Principal rivers are the Ebro in the northeast, the Tajo in the central region, and the Guadalquivir in the south. Off Spain’s east coast in the Mediterranean are the Balearic Islands (1,936 sq mi; 5,014 sq km), the largest of which is Majorca. Sixty mi (97 km) west of Africa are the Canary Islands (2,808 sq mi; 7,273 sq km)..