The Danube is a river in Central Europe, the European Union's longest and the continent's second longest (after the Volga).
Classified as an international waterway, it originates in the town of Donaueschingen--which is in the Black Forest of Germany--at the confluence of the rivers Brigach and Breg. The Danube then flows southeast for 2,872 km (1,785 mi), passing through four Central European capitals before emptying into the Black Sea via the Danube Delta in Romania and Ukraine.
Once a long-standing frontier of the Roman Empire, the river passes through or touches the borders of ten countries: Romania (29.0% of basin area), Hungary (11.6%), Serbia (10.2%), Austria (10.0%), Germany (7.0%), Bulgaria (5.9%), Slovakia (5.9%), Croatia (4.4%), Ukraine (3.8%), and Moldova (1.6%). Its drainage basin extends into nine more.
view of Budapest with the building of Hungarian Parliament,
The Hungarian Parliament Building (Országház or House of the Country or House of the Nation) is the seat of the National Assembly of Hungary, one of Europe's oldest legislative buildings, a notable landmark of Hungary and a popular tourist destination of Budapest. It lies in Lajos Kossuth Square, on the bank of the Danube. It is currently the largest building in Hungary and still the tallest building in Budapest.
Budapest is the capital and the largest city of Hungary, and one of the largest cities in the European Union. It is the country's principal political, cultural, commercial, industrial, and transportation centre, sometimes described as the primate city of Hungary. In 2011, according to the census, Budapest had 1.74 million inhabitants, down from its 1989 peak of 2.1 million due to suburbanization. The Budapest Commuter Area is home to 3.3 million people. The city covers an area of 525 square kilometres (202.7 sq mi) within the city limits. Budapest became a single city occupying both banks of the river Danube with a unification on 17 November 1873 of west-bank Buda and Óbuda with east-bank Pest.