| Erlenplatz |
Bildrechte: Georgi Kunev, <a rel="nofollow" href="https://commons.wikimedia.org/wiki/File:Alnus_viridis_fruit_Bulgaria.jpg">Alnus viridis fruit Bulgaria</a>, <a rel="nofollow" href="https://creativecommons.org/licenses/by/2.5/legalcode" rel="license">CC BY 2.5</a>