The Externsteine, close to Teutoburger Wald in Germany. The picture points out the natural look of the rocks, to give an impression of how they looked before the artificial modifications were done.
<a href="//commons.wikimedia.org/w/index.php?title=User:Greenernie&amp;action=edit&amp;redlink=1" class="new" title="User:Greenernie (page does not exist)">Ernst Grigat</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>