North Africa, Northern Africa is the northernmost region of the African continent, linked by the Sahara to Sub-Saharan Africa. Geopolitically, the United Nations definition of Northern Africa includes seven countries or territories; Algeria, Egypt, Libya, Morocco, Sudan, Tunisia, and Western Sahara. Algeria, Morocco, Tunisia, Libya and often Mauritania are the Maghreb or Maghrib, while Egypt and Sudan are referred to as Nile Valley. Egypt is a transcontinental country by virtue of the Sinai Peninsula, which is in Asia. North Africa also includes a number of Spanish possessions, Ceuta and Melilla (tiny Spanish exclaves or islets off the coast of Morocco). The Canary Islands and the Portuguese Madeira Islands, in the North Atlantic Ocean northwest of the African mainland, are sometimes included in considerations of the region.