<p>A South Polar Pit or an Impact Crater? — It is late summer in the Southern hemisphere, so the Sun is low in the sky and subtle topography is accentuated in orbital images.
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NASA/JPL/University of Arizona (<a rel="nofollow" class="external text" href="http://uahirise.org/ESP_049972_0930">uahirise.org/ESP_049972_0930</a>)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2017-05-23 14:50
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/35015549025/">ESP_049972_0930</a>