Mountain "Brocken" in the "Harz", peak stone. The altitude on higher tablet relates to the line on lower tablet. This line is c. 1 metre above the ground here.
Sönke Kraft aka <a href="//commons.wikimedia.org/wiki/User:Arnulf_zu_Linden" title="User:Arnulf zu Linden">Arnulf zu Linden</a>
<span class="int-own-work" lang="en">Own work</span>