The remains of the Castle can be visited
Wallrabenstein Castle (Ruin)

Wallrabenstein Castle is a castle ruin in the Wallrabenstein district of the Hessian municipality of Hünstetten in the Rheingau-Taunus-Kreis.
Count Walram IV of Nassau-Idstein, son of Count Adolf I of Nassau-Idstein, built the castle around 1390. He died on November 7, 1393, at the age of 40, even before his son
Adolf II of Nassau-Idstein finally completed the castle in the same year. Later, he pledged it to Count Henne von Reifenberg.
From 1439, the castle was further enfeoffed and used as a retirement residence. A cellar bill from 1549 proves that it was still inhabited and in good condition at that time.
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: 50.2685, 8.2354