The remains of the Castle can be visited
Kirkel Castle

The Kirkel castle ruin stands on a freestanding sandstone rock in Kirkel-Neuhäusel. It is a landmark in Saarland.
History+
The first documented mention of a Count of Kirkel dates to 1075. At the beginning of the 11th century, the castle came into the possession of the Counts of Saarwerden. Between 1214 and 1386, the castle was granted to the Lords of Kirkel as an imperial fief. In the 13th century, the small and round towers were constructed. The village of Kirkel emerged in the 15th century. From 1410 to 1689, the complex was owned by the Dukes of Palatinate-Zweibrücken.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: https://commons.wikimedia.org/wiki/File:BurgKirkel_pano1.jpg
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: 49.2831, 7.2403