Easy to reach from Greene. You can also cycle from Einbeck through the city forest, mountain bikes or e-bikes would be helpful. There are toilets on site, the tower should …
Burg Gandersheim is a former moated castle, today the district court of Bad Gandersheim is based in it. The dukes of Braunschweig had the castle built in the 13th century as a counterweight to the Gandersheim Abbey.
The manor house of the Düsterntal estate is also known today as Delligsen Castle; perhaps that sounds better? 😅 Since it's a therapy center, it's not open to the public.