List of tributaries of the Danube
The Danube is Europe's second-longest river. It starts in the Black Forest in Germany as two smaller rivers—the Brigach and the Breg—which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some , passing through several Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania.
Donausteig (Danube Trail)
Among the points of interest along the trail are the "Strudengau" with the "Stillensteinklamm", the "Wolfschlucht" near Bad Kreuzen, the Floodplains of the Northern Machland, the "Klamschlucht", the "Pesenbachtal", the "Obere Donautal Oberösterreichs" with the "Schlögener Schlinge", the "Rannatal" and the "Tal des Kleinen Kößlbachs".The "Donausteig" trail runs along the Danube River, starting in Passau and passing through Linz, the former European Capital of Culture, to Grein, an Upper Austrian town with an altitude of 218 meters above sea level, the lowest in the region.