Cave Saint-Jean, lieu-dit <i>Schnellert</i>,  in the Nature Park of Mullerthal, Luxembourg. The image shows the entrance of the vcave. The ladder leads to a platform above the archaeological excavation site. The excavation is interrupted since 2003.
<a href="//commons.wikimedia.org/wiki/User:Cayambe" title="User:Cayambe">Cayambe</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>