Sand Dune at the Cultural Park of Ahaggar, southern Algeria.
Original: <a href="//commons.wikimedia.org/wiki/User:Hamza-sia" title="User:Hamza-sia">Hamza-sia</a><br><small>Derivative work including rotation, conversion to sRGB, crop, minor adjustments, removal of hotpixel: <a href="//commons.wikimedia.org/wiki/User:Julian_Herzog" title="User:Julian Herzog">Julian Herzog</a></small>
CC BY-SA 3.0
<a href="//commons.wikimedia.org/wiki/File:Dune_de_sable_au_parc_Culturel_De_l%27Ahaggar.jpg" title="File:Dune de sable au parc Culturel De l'Ahaggar.jpg">File:Dune de sable au parc Culturel De l'Ahaggar.jpg</a>