The Blau is a 22-kilometre-long river in Baden-Württemberg, southern Germany, and a left tributary of the Danube. The source of the Blau is the karst spring of Blautopf, in the town Blaubeuren, in the Swabian Jura. From Wikipedia
Two beavers repeatedly entering the B10 highway were relocated to a nearby river to prevent risks to traffic and wildlife.
