human - cave paintings and petroglyphs at boumediene ,tassili najjer national park, algeria

algeria algerie africa desert sahara djanet illizi tassili man men nude human unesco heritage najjer ajjer tadrart acacus akakus carving parietal bull texture pattern reg hamada boumediene petroglyph erg tamezguida national park rock heat dry stone scenery geology arid orange outdoor shadow sculpture hill noires mountain colorful scenic formation abstract