Lowell Crater Rim, as seen by hirise.  Location is 50.5 degrees south latitude and 279.7 degrees east longitude.  Image was taken by the Mars Reconnaissance Orbiter's HiRISE. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. Image courtesy NASA/JPL/University of Arizona.
Jim Secosky modified nasa image.
<a rel="nofollow" class="external free" href="http://hirise.lpl.arizona.edu/PSP_005782_1290">http://hirise.lpl.arizona.edu/PSP_005782_1290</a>