Capital cities on the Danube are Belgrade and BUDAPEST. Belgrade is the capital of Serbia, located in the southeast of Europe, while BUDAPEST is the capital of Hungary, located in the central region of the continent. Both cities are situated on the banks of the Danube River, which flows through 10 countries in Central and Eastern Europe. Belgrade is known for its vibrant nightlife and cultural attractions, while BUDAPEST is renowned for its stunning architecture and thermal baths.