The Volcanic TIbesti Mountain Range.
Hidden in the mountains are hundreds of rock paintings and carvings created by early humans who inhabited the mountains.
Now the mountains are home to the Toubou tribesmen, who live in the heat and aridity of the desert.
The Tibesti Mountains cover an area of 30,000km².
The Tibesti are a collection of huge dark volcanoes, built from the debris and lava from eruptions over millions of years.
The tallest volcano in the Tibesti Range, Emi Koussi, is 3,415m tall.
The Tibesti are the highest mountains in the Sahara, piercing the surrounding desert.