| Heckenstallertunnel |
Bildrechte: Henning Schlottmann (<a rel="nofollow" href="https://commons.wikimedia.org/wiki/User:H-stt">User:H-stt</a>), <a rel="nofollow" href="https://commons.wikimedia.org/wiki/File:Heckenstaller-tunnel_IMG_0990b.JPG">Heckenstaller-tunnel IMG 0990b</a>, <a rel="nofollow" href="https://creativecommons.org/licenses/by/4.0/legalcode" rel="license">CC BY 4.0</a>