What is the Desert to the north of Africa?

The Sahara Desert sits in the northern part of Africa. It is the second largest desert next to Antarctica. The Sahara stretches from the Red Sea, including parts of the Mediterranean coasts, to the outskirts of the Atlantic Ocean. To the south, it is delimited by the Sahel, a belt of semi-arid tropical savanna that composes the northern region of central and western Sub-Saharan Africa.