Stein Castle
Traunreut, Germany
Stein Castle (Schloss Stein) in Stein an der Traun is the most important cave castle in Germany. The castle comprises three elements: the upper house on the almost 50 metre high steeply sloping nagelfluh rock face; the cave castle beneath it, which hides a passage to the Traun valley in the rock; the lower house in Stein itself.
Brewery data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).