Schlüsselberg_Castle
Schlüsselberg Castle (German: Burgstall Schlüsselberg) was a high medieval, aristocratic castle in the Franconian region of Germany. Its ruins lie on a hill above the Pulvermühle, a southern town quarter of Waischenfeld in the Upper Franconian county of Bayreuth in Bavaria.
The burgstall of the castle is freely accessible.