The cave is located at the exit of the village of Grendelbruch and is a replica of the real cave of Lourdes.
The cave used to be a quarry and it was built in the 1970s.
Dug into the sandstone, this cave is the largest natural cavity in the Vosges mountains. It is possible to climb above its entrance to enjoy a magnificent panorama of Walscheid and its surroundings.