Acacus Mountains — Wikipedia

The Acacus Mountains or Tadrart Akakus (Arabic: تدرارت أكاكوس / ALA-LC: Tadrārt Akākūs) form a mountain range in the desert of the Ghat District in western Libya, part of the Sahara. They are situated east of the city of Ghat, Libya, and stretch north from the border with Algeria, about 100 kilometres (62 mi). The area has a particularly rich array of prehistoric rock art.