Oblique view of southern Mare Tranquillitatis, on the moon.  <a href="https://en.wikipedia.org/wiki/Wallach_(crater)" class="extiw" title="en:Wallach (crater)">Wallach</a> crater is near the horizon at right.  Part of lunar module visible at right.  The small crater Maskelyne J is at center, and a portion of the mare at left is Maskelyne D.  The lighter highlands in front of Maskelyne D are informally known (by the Apollo astronauts) as <i>Barbara Mesa</i>, and a group of ridges at left are known as <i>Bob's Bend</i>.
NASA
1969
Apollo Flight Journal, Apollo 10, Photography Index, <a rel="nofollow" class="external text" href="https://www.hq.nasa.gov/office/pao/History/afj/ap10fj/photos/29-p.html">70-mm magazine P</a>, image <a rel="nofollow" class="external text" href="https://www.hq.nasa.gov/office/pao/History/afj/ap10fj/photos/29-p/as10-29-4288.jpg">AS10-29-4288</a>