<p>The Mask of Mars — Polar dunes on the right bracket this contrast of light and dark terrain that resembles an evil mask.
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NASA/JPL/University of Arizona (318 km above the surface, 5 km across) <a rel="nofollow" class="external text" href="https://www.uahirise.org/PSP_009677_2775">www.uahirise.org/PSP_009677_2775</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/39862464472/">PSP_009677_2775</a>