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 Stuttgart announced that "the source of the Breg is not anymore displayed as the source of the Danube on ministerial maps. The land surveying office was instructed to act accordingly." However, the former minister for agriculture and forestry confirmed in a document addressed to Prof. Öhrlein in 1982: "Getting back to the issue regarding the source of the Danube, I can once again confirm that the so-called source of the Danube in Donaueschingen is certainly not the real source of the river Danube, if analysed with geographical and hydrological criteria. The river Breg can rightly be called the main stream