Routable GPS map for Garmin navigation devices. Algeria is an Arab and Berber country in North Africa. It has a Mediterranean Sea coastline in the north. It is surrounded by Morocco to the northwest, Tunisia to the northeast, Libya to the east, Niger to the southeast, Mali to the southwest, Mauritania and Western Sahara to the west. After the secession of South Sudan from Sudan in 2011, Algeria became the largest country in Africa.