The remains of the Castle can be visited
Mühlhäuser Castle (Ruin) (Breitenbach)

The Mühlhäuser Schlösschen ruin in Breitenbach, Hesse, was originally conceived as a fortified house or moated castle, and likely served as the seat of a minor nobleman. Despite the lack of written records, the building's fabric provides insights into its history and function.
History+
There are no written records regarding the exact period of construction or the inhabitants of the Mühlhäuser Schlösschen. The interpretation of the ruin is primarily based on the analysis of the preserved wall remains, comparisons with similar structures, and archaeological findings.
Source: Wikipedia · Licence: CC BY-SA 4.0
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: 49.7967, 9.0515