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 Rhine Valley Vorarlberg Rhine Valley The Vorarlberg Rhine Valley (), also called the Vorarlberg Oberland and Unterland, is a section of the Alpine Rhine Valley and is divided into the Upper and Lower Rhine Valley ("oberes" and "unteres Rheintal") based on the direction of flow of the river. The Unterland runs from the shore of Lake Constance to the Kummenberg, the Upper Rhine valley lies south of the Kummenberg. The Unterland covers the whole of the administrative district of Dornbirn and all the territories of the district of Bregenz that lie within the Rhine Valley. In this region, which includes the urban