Source of the Danube
As early as 1847 the following definition can already be found in the "Universallexikon des Großherzogtums Baden" (Universal Lexicon of the Grand Duchy of Baden): “Danube, the biggest river of Germany, rises at the Martinskapelle in a wild and lonely area of the Black Forest, is called Brege at its origin and forms the river Danube in Donaueschingen where it is unified with the Brigach." (German original: „Donau, der größte Fluß Deutschlands, entspringt bei der Martinskapelle in einer wilden und einsamen Gegend des Schwarzwaldes, heißt am Anfang Brege… und bildet erst in Donaueschingen, wo sie sich mit der Brigach vereinigt, die Donau.“)
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.