It begins in the Caucasus Mountain Range
Its the Danube river and Danube plain separates Romania and Bulgaria. There are no mountaneous border between the mentioned two countries. And Carpathian mountain range of Romnia or Balkan mountain range (most northern mountains of Bulgaria: none of them serves as border.
Danube River
Rhine and Rhone originate in the Swiss Alps, the Po in the Italian Alps and the Danube in the German Balck Forest
danube
One of Europe's most important waterways is the way they get water-from a very large spring or river or mountain stream.It is the Rhine River.
Danube River Danube River Danube River
Danube River
Balkan mountain ranges, the Danube river, the cave Peshtera etc.
the alps are 1 of the many mountain ranges also thew river Danube is a river in austria
The Danube River is located in Europe.
The Danube River is on the continent of Europe.
Danube river gradient