Where is the river Danube and where is its source and length
Originating in Germany, the Danube flows southeast for 2,860 km (1,780 mi), passing through or touching the border of Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova and Ukraine before emptying into the Black Sea.Its drainage basin extends into nine more nations.he Danube is navigable by ocean ships from the Black Sea to BrÄila in Romania and by river ships to Kelheim, Bavaria, Germany; smaller craft can navigate further upstream to Ulm, Wuerttemberg, WÃ¼rttemberg. Germany about 60 of its tributaries are also. navigable