Fortified castle ruins on the Hohentwiel in Singen
The Hohentwiel, with an area of nine hectares and one of the largest fortress ruins in Germany. Exceptional views of Lake Constance, the Hegau volcanoes, and the Alps. Former residence of the Swabian dukes and a Württemberg state fortress.
Tip: Many hiking possibilities up and around the Hohentwiel. Also worth visiting: The MAC Museum Art & Cars, at the foot of Hohentwiel.
Total driving distance: 35 km