In this VIS image, taken by the NASA - Mars Odyssey Orbiter on September, 7th, 2014, and during its 56.479th orbit around the Red Planet, we can see a (relatively) large Field of Dark Sand Dunes that is deposited on the very flat Floor of an Unnamed Impacr Crater located in the Martian Southern Hemisphere's Region known as Terra Cimmeria. If you pay attention, you will be able to spot a number of Gullies (---> small Channel-like Features of still not completely clear origin) which widely dissect both the Northern Inner Rim and Slopes of the Crater itself.
Latitude (centered): 37,8926° South
Longitude (centered): 136,3170° East
This image (which is an Original Mars Odyssey Orbiter b/w and Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 18755) has been additionally processed, magnified to aid the visibility of the details, contrast enhanced and sharpened, Gamma corrected and then colorized in Absolute Natural Colors (such as the colors that a normal human eye would actually perceive if someone were onboard the NASA - Mars Odyssey Orbiter and then looked down, towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.