Burgruine Kallenberg, Gemeinde Buchheim, Landkreis Tuttlingen: Bergfried mit <a href="https://en.wikipedia.org/wiki/de:Hocheingang" class="extiw" title="w:de:Hocheingang">Hocheingang</a>
Photo: Andreas Praefcke
CC BY 3.0
<span class="int-own-work">Self-photographed</span>