The River Danube runs through which three Capital Cites?

The Danube River runs through the capitals of four countries in Europe, but three of them are major capital cities:

1. Vienna (Austria)
2. Bratislava (Slovakia)
3. Budapest (Hungary)

The fourth capital the Danube passes through is Belgrade, the capital of Serbia.

These cities are significant cultural and historical hubs, and the Danube plays an important role in the economies and daily life of these countries.