The Danube
There is no geographical feature that forms the border between Portugal and Spain. The Strait of Gibraltar and Mediterranean Sea separates Iberian Spain and Morocco. The Pyrenees Mountains forms the border between Spain and France and Spain and Andorra.
The tweed
The 42nd parallel forms the southern boundary of Idaho. It marks the border between Idaho and Nevada as well as a portion of the border between Idaho and Oregon.
the yalu river
The Danube River forms the border of some countries. They are Romania, Bulgaria, Hungary, Serbia, Slovakia, Austria and Germany.
Slovakia and Hungary
The Danube
This river is called Danube. Its a northern border to Bulgaria and for Romania the south bound.
Danube, which flows through Slovakian cities of Bratislava, Komarno and Sturovo, is the river which is a border between Slovakia and Hungary, on some 200 km.
The River Danube forms the southern border of Romania. The next country to the South is Bulgaria. The River Danube is famous for the waltz of the same name.
This is the river Danube.
The Romanian border is formed by Danube, Black Sea and a long part on land.
Danube.
This river is Danube.
Danube River
Danube River