What cities does the Danube River flow through?

- Passau

- Regensburg

- Ingolstadt

- Ulm

Austria:

- Linz

- Vienna

Slovakia:

- Bratislava

Hungary:

- Budapest

Serbia:

- Belgrade

Croatia:

- Osijek

- Vukovar

Bulgaria:

- Ruse

Romania:

- Galati

- Braila

Ukraine:

- Izmail