The ruin of Hertenstein, also called Hertenstein Castle or Old Castle, is the ruin of a spur castle of unknown status between Jungnau and Bingen in the district of Sigmaringen. A board at the ruin tells about the history of the former castle. Enjoy a magnificent view here.
The premium hiking trail "Witbergrunde" of the Donaufelsenläufe leads directly past this magnificent place.