European watershed area of the Rhine, which empties into the North Sea via the Netherlands, and the Danube, which flows eastward emptying into the Black Sea. It enters Austria at Piz Buin in the Silvretta Alps running along the Arlberg massif and forming the border between the states of Tyrol and Vorarlberg. It reaches Bavaria, Germany via the crest of the Allgäu Alps and leaves the High Alps at the Adelegg range near Kempten. Within the Alpine foothills it runs north of the Schussen catchment area of Lake Constance towards the sources of the Brigach and Breg headwaters of the Danube in
Vorarlberg Railway Vorarlberg Railway The Vorarlberg Railway () denotes a through line running through the Austrian state of Vorarlberg. Its route is similar to the Rheintal/Walgau Autobahn from the border between Lindau and Hörbranz to Bludenz, where it connects to the Arlberg Railway. The entire route is owned and operated by the Austrian Federal Railways ("Österreichische Bundesbahnen", ÖBB). The Vorarlberg Railway is the western continuation of the Arlberg Railway (ÖBB timetable number AT 401) through the Walgau valley and the Vorarlberg section of the Rhine Valley. Already in 1847, the entrepreneur Carl Ganahl, later the main proponent of the railway construction in