LROC WAC image of Clavius.
NASA
<a rel="nofollow" class="external text" href="http://wms.lroc.asu.edu/">SER WMS System</a>, <a href="//commons.wikimedia.org/w/index.php?title=Lunar_Reconnaissance_Orbiter&amp;action=edit&amp;redlink=1" class="new" title="Lunar Reconnaissance Orbiter (page does not exist)">LROC</a> WAC data.