The North Polar Erg (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA:"Spring in the Northern Polar Region means the return of the Sun. This image shows a small portion of the North Polar Sand Sea, an immense Region of sand dunes. The dunes are just starting to shed their Winter frost and will darken as Spring becomes Summer and the dark sand is revealed".