The Danube is the second longest river in Europe (after the Volga) and flows through 10 countries - Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, and Ukraine.
The Danube originates in Germany's Black Forest and flows into the Black Sea.
It is the only river that flows through the capital cities of four countries: Vienna, Bratislava, Budapest, and Belgrade.
The Danube Delta is a UNESCO World Heritage Site and is home to over 300 species of birds.
The Danube played an important role in developing ancient civilizations such as the Celts, Romans, and the Ottoman Empire.
The Danube is a major transportation route for goods, connecting the North Sea to the Black Sea.
The river is also famous for river cruises, with many companies offering trips through different river sections.
The Danube is home to several hydroelectric power plants, including the Iron Gates Dam, the largest dam on the Danube.
The Danube is also a popular spot for fishing, with species such as catfish, pike, and carp found in the river.
The Danube is popular for water sports, such as swimming, kayaking, and rafting.
The Danube is also a source of drinking water for millions of people living in the countries through which it flows.