1. The Danube River is the most largest river in Europe.
2. This river is an international waterway.
3. The Danube River empties into the Black Sea.
4. This river flows through the borders of ten countries and they are Romania, Ukraine, Moldova, Bulgaria, Serbia, Croatia, Huingary, Austria, Germany and Slovakia.
5. The river is navigable by ocean ships.
6. The Danube Delta wetlands support a variety of migratory birds.
7. This river is also a source of drinking water for about ten million people.
8. Since the Middle Ages, fishing from the Danube has declined.
9.  A few fishermen are still active along certain parts of the river today.
10. The Danube River attracts quite a few tourists.

This information was from: http://www.helium.com/items/2213058-interesting-facts-about-the-river-danube