The Danube: the Border Between Romania and Bulgaria
The Danube River runs through the center between two mountain ranges, marking the border between Romania (above) and Bulgaria (below).
The Danube, with steep bluffs on the Bulgarian side and a wide area of swamps and marshes on the Romanian side, is one of the most effective river boundaries in Europe.
The city of Bucarest is located in the upper right quadrant, between the river and the northern mountain range.
The snow-capped mountain range visible to the north is part of the Southern Carpathians, also called the Transylvanian Alps.
The Southern Carpathian group is the second highest group of mountains in the range, reaching heights of over 2,500m. Although considerably smaller than the Alps, they are classified as having an alpine landscape.
Several rivers flow downwards from the mountains and merge with the Danube.
Further south, the Balkan mountain range runs through the center of Bulgaria. It is remarkable for its flora and fauna.