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Hace 14 horas · The Danube (/ ˈ d æ n. j uː b / DAN-yoob; see also other names) is the second-longest river in Europe, after the Volga in Russia.It flows through Central and Southeastern Europe, from the Black Forest south into the Black Sea.A large and historically important river, it was once a frontier of the Roman Empire. In the 21st century, it connects ten European countries, running through their ...
