Adrar is a large region in Mauritania, named for the Adrar Plateau. Its capital is Atar. Other major cities/towns include Choum, Chinguetti and Ouadane. The region border Western Sahara and the Mauritanian region of Tiris Zemmour to the north, Mali and the Mauritanian region of Hodh Ech Chargui to the east, the Mauritanian region of Trarza and Tagant to the south and the Mauritanian region of Inchiri to the west.