18.8N 12.4E

Visible amidst the Sahara Desert sands in Africa are two important mountain ranges: the Aïr Mountains (left) and the Tibesti Mountains (upper right), as well as Lake Chad (lower right). Lake Chad is a historically large, shallow, endorheic lake that provides water to more than 20 million people living in the four countries that surround it (Chad, Cameroon, Niger, and Nigeria) on the edge of the Sahara Desert.

The Aïr Mountains (also known as the Aïr Massif or Air of Niger) is a triangular massif, located in northern Niger, within the Sahara desert. Part of the West Saharan montane xeric woodlands ecoregion, they rise to more than 6,000 ft (1 830 m) and extend over 84 000 km².

The Tibesti Mountains are a range of inactive volcanoes located on the northern edge of the Chad Basin in the Borkou- and Tibesti Region of northern Chad. The massif is one of the most prominent features of the Central-Sahara desert and covers an area of approximately 100,000 km². The northern slopes extend into southern Libya.

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