Its small entrance allows us to enter a very narrow 3 metre shaft, at the bottom of which a small hole can be seen; once this has been passed with considerable difficulty, we can stand upright again, while observing at the upper end of the small chamber a little hole that communicates with the outside, but which is totally impenetrable.

Cavity excavated in a stretch of Muschelkalk limestone, while observing in the upper stretch some forms of erosion.