Wolkenstein ruin, Medieval castle ruin in Hemishofen, Switzerland

Wolkenstein ruin is a rock castle built in the 12th century on a rocky spur of the Wolkensteinerberg, the last foothill of the Schiener Berg, high above Hemishofen in the canton of Schaffhausen. The castle is now gone, leaving only the castle site (Burgstall). East of the site stands Hohenklingen Castle.

The fortress dates from the medieval period and was part of the Schaffhausen region's defensive network to control local territories. Over time the structure lost its military purpose and gradually decayed into the ruins visible today.

The ruin lies on a rocky spur of the Wolkensteinerberg, the last foothill of the Schiener Berg, high above Hemishofen. East of Wolkenstein stands Hohenklingen Castle, so the two fortifications can be seen in relation to one another from the ridge.

The site is accessible via marked paths and best visited during daylight when the ruins are clearly visible. Sturdy footwear is advisable as the ground can be rough and the remaining walls are uneven in places.

The castle site occupies a rocky spur on the Wolkensteinerberg, the last outlier of the Schiener Berg, high above Hemishofen. The neighbouring Hohenklingen Castle stands to the east of the vanished fortress.