Tadrart Acacus is the UNESCO World Heritage site in Libya famous for prehistoric rock art in the Tadrart Acacus mountains.
The site occupies a mountainous desert region in western Libya, close to the town of Ghat and the Algerian border. Its sandstone cliffs, arches, caves, and ravines preserve thousands of paintings and engravings made over many millennia.
The artworks record major environmental changes in the Sahara. Earlier scenes show cattle, giraffes, elephants, rhinoceroses, and other animals that lived there when the region was much wetter. Later images increasingly feature horses, chariots, and finally camels, reflecting changing cultures and desert conditions.
Tadrart Acacus is sometimes confused with nearby rock-art areas such as the Messak Settafet or Jebel Uweinat. UNESCO inscribed it in 1985 because its art and archaeological remains provide exceptional evidence of prehistoric life in North Africa. The site has also faced serious threats from conflict, looting, and vandalism.