The Pinner Felsen (Pinn mountain). The quarry from which most of the material for the dam of the Wahnbachtalsperre originates
<a href="//commons.wikimedia.org/wiki/User:Drhayes" title="User:Drhayes">Drhayes</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>