Impressive grotto and pilgrimage site. You should really stop here and enjoy the gentle coolness and fill your bottle with the water from the Karlsquelle (which is said to have healing powers).
A small entrance gives access to this fairly deep cave. It owes its name to Doctor Herrings, a village doctor with a passion for caving who died here following a landslide in 1914.
These caves constitute a fascinating network of caves and cavities. You can visit the Truchet, Creux aux bêtes, Silberloch and Lucelle caves, which reveal the geological history of the region. These caves are a great place for photography!