The diverse geography of Tunisia includes the fertile plains of the north, the semi-arid central region, and the southern desert, which is part of the vast Sahara. Tozeur is a gateway to the desert an...The diverse geography of Tunisia includes the fertile plains of the north, the semi-arid central region, and the southern desert, which is part of the vast Sahara. Tozeur is a gateway to the desert and serves as a starting point for excursions to the Chott el Jerid, a vast salt lake, and the mountain oases of Chebika, Tamerza, and Mides.