Jul 13, 2021 · The Danube River ultimately drains into the Black Sea via the Danube Delta. The river is known by various names in the countries where it flows through. In the countries of Germany and Austria it is known as Donau; …

The Danube River is the second-longest river in Europe. It passes through ten countries and four capital cities: Vienna, Bratislava, Budapest, and Belgrade.

The Danube is Europe's second longest river after the Volga and the longest river in the European Union. It originates in Germany's Black Forest as the much smaller Brigach and Breg rivers, which join at the town of Donaueschingen.