In this VIS image, taken by the NASA - Mars Odyssey Orbiter on July 6th, 2013, and during its 51.276th orbit around the Red Planet, we can see a large Dunefield that lies on the relatively flat Floor of an Unnamed Impact Crater located in the Southern Martian Region known as Terra Sirenum.
Terra Sirenum is a large Region located in the Southern Hemisphere of Mars and it is centered at 39,42° South Latitude and 150,00° West Longitude. It covers something like 3900 Km (such as a little less than 2422 miles) at its broadest extent and it goes from Latitudes 10° to 70° South and Longitudes 110° to 180° West.
Terra Sirenum - which lies in the Phaethontis Quadrangle of the Red Planet - is a so-called "Upland (or also Highland ---> meaning "elevated", with respect to the Datum, or 0 - zero - Altitude) Area", and it is notable for the presence, all over its large and wide Surface, of massive Cratering (among the many Impact Craters of Terra Sirenum, we wish to remind you the extremely large Newton Crater, with a diameter that is close to 300 Km - such as about 186,3 miles -!).
Latitude (centered): 61,5213° South
Longitude (centered): 199,7750° 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 17422) has been additionally processed, magnified, contrast enhanced, Gamma corrected and then colorized in Absolute Natural Colors (such as the colors that a 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.