The Hohle Stein near Alfdorf-Vordersteinenberg in the Upper Gellbach Valley is designated as a geotope. The erosion cave was created in the so-called cave sandstones of the upper Stubensandstein formation. …
It's really impressive that such a natural sandstone dwelling is being built in the middle of the forest. The trees seek their way with their roots on the roof of the Götzenloch.