In hydrological point of view the German section of the Danube offers many interesting places. First of all: where does the Danube come from? There are two branches, the Breg and Brigach, and a wonderful well at Donaueschingen. Then there is the “Donauversickerung” phenomenon. This is the place where the Danube simply decides, that this time it flows right into the North Sea, rather than the Black Sea. And at Passau, the city of three rivers we find the estuary of the Inn river. You have to know, Inn has a discharge 7% more than the Danube. Moreover at first sight Inn is wider and somehow its color is different. Despite all, the Danube can keep its name and the Inn dissolves in the smaller river.
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