The remains of the Castle can be visited
Château de Guirbaden

The Château de Guirbaden, a castle ruin in the Vosges mountains, is on a 569-meter-high promontory above the Magel valley near Mollkirch in the French department of Bas-Rhin. It is one of the largest Staufer-era castle complexes in Alsace.
History+
The first documented mention of the castle as "Girbadun" occurred in 1137. It is believed that Count Hugo VII of Dagsburg-Egisheim (1095–1137) had it built at the latest by this time to protect the nearby Benedictine abbey of Altorf. In 1162, the complex was destroyed on the orders of Frederick I Barbarossa.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Ruines_du_Guirbaden.jpg?uselang=de
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 48.4935, 7.3708