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
Tyrol Tyrol are Innsbruck, Trento and Bolzano. The whole region of Tyrol is located in the Alps. Tyrol is bordered to the north by the state of Bavaria and to the east by the states of Carinthia and Salzburg. West of Tyrol lies the state of Vorarlberg and the canton of Grisons. On the southern side of Tyrol, the land is bordered by the regions of Veneto and Lombardy. Important rivers in Tyrol are the Adige, Inn and Drau. The region is characterized by many valleys. Some of these valleys are still difficult to reach today. The most important valleys are