Danube
Classified as an international waterway, it originates in the town of Donaueschingen, in the Black Forest of Germany, at the confluence of the rivers Brigach and Breg. The Danube then flows southeast for about , passing through four capital cities (Vienna, Bratislava, Budapest and Belgrade) before emptying into the Black Sea via the Danube Delta in Romania and Ukraine.
Kamp
The Kamp is a 168 km long river in northern Austria, left tributary of the Danube. The source of the Kamp is on the border of Lower Austria and Upper Austria, near the town Liebenau, in the Mühlviertel. It flows generally east through Rappottenstein (where it receives its tributary "Kleine Kamp"), Zwettl, Krumau am Kamp and Gars am Kamp. The Kamp flows into the Danube near Grafenwörth, east of Krems.