Schlossberg Cliffs, Quedlinburg

A very fine-grained layer is particularly sensitive to the ingress of water. When wet, this layer begins to flow. At the southwestern foot of the mountain, this layer can be seen very clearly in the so-called cliffs. There, large clods of the more firmly bound sandstone have slipped on this flowing layer over the past few decades.
Therefore, extensive security measures have been taken on the retaining walls in recent years. The walls are held in place by anchors sunk deep into the sandstone. This prevented further slipping for the time being. Extensive construction work is required for basic security.
See de.wikipedia.org/wiki/Schlossberg_(Quedlinburg)

Worth seeing, history to touch.

The sandstone Schlossberg belongs to the ridge of the Quedlinburg saddle.