At this point is the entrance to an old slate tunnel. Slate and hard coal have been mined at the same site since 1773. In 1868 the "Société forestière du …
This grotto was built by the inhabitants in recognition of the protection of the Holy Virgin during the last war, even though two children from the parish died in German …
The water of the stream disappears into an underground cavity (doline or chantoir) in Rue Falise and reappears in Vaux-sous-Olne in the garden of the "Villa des Hirondelles" 760 m …