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
Danube Hills even exclusively restricted to this area which covered 376 km², which only covered the higher parts of the Vorderer Forest. It became major unit 405 in the natural region major unit group, the Upper Palatine-Bavarian Forest (40). English sources variously use the names Vorderer Forest, Danube Hills, Vorderer Wald, or Anterior Bavarian Forest. Regardless of this, the part designated as the "Falkensteiner Vorwald" in regional studies is also called the "Vorderer Bayerischer Wald" in German sources used for tourism purposes. However, the following description is based on the regional structure. The natural region of the Danube Hills is only 8