desert landscape with acacia in moul naga valley at in tassili najjer national park in algeria

algeria algerie africa desert sahara djanet illizi tassili unesco heritage najjer ajjer tadrart acacus akakus erg acacia vachellia thorn shittahz tree plant haloxylon berdj moul moulnaga naga national park sand dune rock nature landscape dry stone sunny scenery arid sky outdoor shadow panorama hill barkhan noires mountain colorful adventure scenic