This cave, located on the cliffs of <a href="https://en.wikipedia.org/wiki/Bonifacio,_Corse-du-Sud" class="extiw" title="en:Bonifacio, Corse-du-Sud">Bonifacio</a> (<a href="https://en.wikipedia.org/wiki/Corse-du-Sud" class="extiw" title="en:Corse-du-Sud">Corse-du-Sud</a>, leads to the bottom of the Saint Barthelemy water well. The path above the cave entrance can be reached from the <i>King of Aragon's Stairs</i>. The well itself is dug inside the cliff and thus isn't visible on this picture.
<a href="//commons.wikimedia.org/wiki/User:Telperion" title="User:Telperion">Telperion</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>