Danube Valley Railway (Baden-Württemberg) Inzigkofen was pushed through by the German general staff, for whom the Danube Valley Railway was seen as a strategic railway in case of another war with France. Since 1901, the Danube Valley Railway, together with the Höllentalbahn (Schwarzwald), form part of the pan-regional railway link from Ulm to Freiburg im Breisgau. The Danube Valley Railway runs alongside the Danube river and crosses it several times. From Immendingen the line runs across the Upper Danube Nature Park "(Naturpark Obere Donau)", brushing up against the southern edge of the Schwäbische Alb, all the while following the course of the Danube. Between
Source of the Danube of the Danube." Source of the Danube The Danube is conventionally taken to be formed by the confluence of the two streams Brigach and Breg just east of Donaueschingen. Known as the source of the Danube ("Donauquelle") the source of the "Donaubach" in Donaueschingen itself. Hydrologically, the source of the Danube is the source of the Breg as the larger of the two formative streams, which rises near Furtwangen. There was an active rivalry between the municipalities of Furtwangen and Donaueschingen for the claim of being home to the "official" source of the Danube since the 1950s, sometimes with the