Ach

The Aach is a river located in Baden-Württemberg, Germany.Sights and structuresIn Schelklingen are the ruins of Hohenschelklingen Castle and Saint Afra's Chapel with its Gothic fresco cycle. In the Aach valley are the Hohler Fels, one of the largest caverns in the Swabian Jura and south Germany, in which archaeologically important discoveries were made. On the opposite side of the valley stands the Sirgenstein, a twenty-metre-high rock outcrop on which there are traces of a Stone Age cave dwelling and a medieval castle. Further down the valley are the ruins of Günzelburg Castle and another Stone Age cave, Geißenklösterle, and yet another Stone Age cave, Brillenhöhle Cave. In Blaubeuren are the Blautopf and, nearby, the former Blaubeuren Abbey with its abbey church, the ruins of the Rusenschloß and the hammer mill.