The Libyan Desert covers areas in western Egypt, southern Libya, and north-western Sudan. While most of this desert comprises sand plains, dunes, ridges, and depressions, especially in southern Libya it has a beautiful diversity of landscapes. An example of such a diversity can be seen in this 100 m image of 12 January 2015, taken near the Libyan-Egypt-Sudan border. It shows some fluent sand dunes mixed with the rough elevations of the Tibesti, a mountain range of volcanic origin.