Keeping the title of the second-longest river in Europe, bested only from the Volga River (central and south Russia), the Danube’s banking institutions are lined with castles and fortresses, physically displaying the importance of the river that songs including the famous waltz, The Blue Danube ( From the nineteen sixties https://jeffreyjzlns.blog-gold.com/45518808/a-secret-weapon-for-danube-river