One of my favorite castles in the Rheingau: Schloss Vollrads in Winkel. The tower you see on the right is standing in the middle of a lake.
Unfortunately, the castle has a sad story connected to it. The last owner, Count Erwein Matuschka-Greiffenclau inherited the property from his family in 1975. The castle and the connected winery had already been deep in debt which had been hard to lower. In 1997, when the bank decided not to extent the credit, he committed suicide since he couldn't stand the shame of loosing the family property.
Needless to say, that it had been a big story in the area. Especially since he had been quite popular - he was president of the "Deutscher Weinbauverband" (German Alliance of Winegrowers) at that time.