A shell hole, possibly from a small infantry mortar between Mount Harriet (in the background) and Two Sisters (behind the camera).
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/147447263@N02">Nick /</a> from United Kingdom
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/intrepidexplorer82/51066638627/">Shell Hole (with shrapnel)</a>