The Danube (/ˈdæn.juːb/ DAN-yoob; known by various names in other languages) is Europe’s second-longest river after the Volga, flowing through much of Central and Southeastern Europe, from the Black Forest into the Black Sea. Its longest headstream Breg rises in Furtwangen im Schwarzwald, while the river carries its name from its source confluence in Donaueschingen onwards.
Source: Wikipedia
