Directly overlooking the Lake Schiffenen is a carved out cave measuring 120 meters which was chiseled out in the rock by two hermits around 1700.  The floor, as it was recently discovered, is actually a fossilized sandstone dune from prehistoric times. The dwelling in the cliff was later expanded to its current size by the hermit Johann Dupré and his helper Johann Liecht between the years 1680-1708.  We had a great picnic lunch and walked around this – strange and a bit creepy place.