Schneckenlochhoehle/Schneckenlochbachhoele (meaning: "Snailhole cave", 1270 masl) in the municipality of Egg in the Bregenzerwald (Vorarlberg, Austria). Second longest cave in Vorarlberg with a length of around 3500 meters and a difference in height of 150 meters. Turbellaria in the cave.
<a href="//commons.wikimedia.org/wiki/User:Asurnipal" title="User:Asurnipal">Asurnipal</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>