Erg of Bilma

The Erg of Bilma is a great expanse of dunes in the Ténéré, south and east of the Kawar oasis chain. The oasis of Bilma stands at the edge of this sea of sand, while the dunes farther south formed a formidable stage on the route between Bornu and Fezzan. In the central erg, long passages between low dunes provided ways for salt caravans travelling through the desert.