Grube Amalienhöhe, <a href="https://en.wikipedia.org/wiki/en:Waldalgesheim" class="extiw" title="w:en:Waldalgesheim">Waldalgesheim</a>, Rhineland-Palatinate, Germany
Marion Halft
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>