Blautopf Blaubeuren with industrial monument Hammerschmiede, source of the little river Blau in a landscape with forest. Karst spring, geotope and geopoint of the UNESCO Swabian Alb Geopark, tourist attraction. The popular excursion destination is now being thoroughly renovated and will therefore be closed to visitors until the end of 2028. Drone photo. Blaubeuren, Baden-Württemberg, Germany, Europe