Hilsenstein castle ruin

Hilsenstein castle ruin sits on a rocky outcrop at 615 meters elevation, with remaining wall fragments and window openings scattered across the site. The structure merges into the natural rock formation, creating a series of distinct sections where living quarters and fortifications once stood.

The castle was built around 1250 and inhabited until about 1300, likely owned by the Münch family, who held the title of Gempener knights. After this initial period, the site fell out of regular use as the family's interests shifted elsewhere.

The eastern rock face displays a 1940 sgraffito by Theodor Ganz showing a Virgin, deer, and medieval Swiss soldiers. This artwork reflects how artists have interpreted the site's historical layers for visitors who pass through today.

Access to the ruins is via a forest path from Gempenstrasse, following the last hairpin turn before Gempen village. Sturdy footwear is recommended since the path crosses uneven terrain and exposed rock.

Natural rock chambers and cracks beneath the former main tower served as foundations for auxiliary buildings, allowing builders to use the landscape itself as part of the structure. This integration of geology and construction reveals medieval engineering practicality.