Tassili n'Ajjer

Sandstone massif in Algeria's central Sahara Desert

Tassili n'Ajjer (Berber: Tassili n Ajjer, Arabic: طاسيلي ناجر, romanized: ṭāssīlī naʾjir; "Plateau of rivers") is a mountain range in the Sahara desert, located in south-eastern Algeria. It holds one of the most important groupings of prehistoric cave art in the world and covers an area of more than 72,000 km² (28,000 sq mi). The site has been designated a national park and a Biosphere Reserve, and was inducted into the UNESCO World Heritage Site list in 1982.

From Wikipedia, under CC BY-SA. More on occurri.