Dettingen Höllenlöcher

Very impressive - you should definitely see it for yourself 👍🏻

An absolute highlight. Be sure to walk through it and use the two short steel ladders. The canyon is very impressive!

Walter Röhm, author of the Bad Urach hiking book, explains how the hell holes came about
so - actually they are cracks in the rocks of the Weißjura delta lying on top in this area of the Alb - so that the underlying marl layers of the Weißjura gamma are to be regarded as impermeable to water. As a result, water that has penetrated into the upper layers, hitting the marl, must come out and flow down the slope and cannot seep away. During this process, according to Röhm, the layers of marl soften and become slippery, so that they no longer offer proper support to the rocks above. This process continues until individual clods tear out and go to the valley. The dizzyingly narrow rocks lying down the valley – if not already hanging – are floes that are doomed to fall but have not yet gone down into the valley, and which have already become detached from the Alb body as a result of the process described above. It will be difficult to predict when they will follow other crash candidates that have preceded them.