Sand dunes in Erg Chebbi sand sea, Sahara Desert, near Merzouga, Morocco, North Africa, Africa

africa arid landscapes color image contemporary day desert deserts dunes erg chebbi geology landscape landscapes merzouga morocco natural phenomena natural world nature nobody north africa outdoors photography physical geography rippled ripples sahara sand sand seas sandy scenics skies sky surface processes topography travel travel destinations vertical weather african color colour daytime moroccan northern africa outside