Schloss Weissenstein. Usually you can only catch a glimpse of the home of the Fürst of Castell-Rüdenhausen from the street. However, the day I went there, there was an autumn market with local produce happening in the park and so I got a bit closer than usual as it was open to the public that day.
Good to know:
Schloss Rüdenhausen is not open to the public and its park only on selected days. The family cemetery is located on the opposite side of the street and is open to the public every day.