Close to the German / Danish border, in the state of Schleswig-Holstein, in a small town called Grödersby, a rather splendid four-floor ‘Dutch’ windmill dating back to 1888 can be found.
Unfortunately as the mill is now a private residence there is currently no public access.
It is though possible to rent a beautiful nearby little house called Mühlenholz, which used to belong to the owners of the mill, at a very reasonable rate. Full details of the cottage can be found here.