Danube River

The danube river is the second longest in Europe, at 1771 miles—only the Volga River is longer. It has been an important international waterway for many years, and in the ancient world represented the northern border of the Roman Empire as the river Danuvius.

The catchment area for the river is in southern Germany, where two streams, the Breg and the Brigach, combine to form the river near Donaueschingen, a small town on the eastern slopes of the Black Forest. The river then passes through the Swabian and Franconian mountains, passing the Bavarian plateau and then reaching its northernmost point at Regensburg, the capital of the Upper Palatinate. It then flows south through Passau into Austria, passing through Linz to Vienna, where, to reduce the threat ...