The Tatras.
Slovakia and Hungary
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 Danube River forms the border of some countries. They are Romania, Bulgaria, Hungary, Serbia, Slovakia, Austria and Germany.
ghats!
ALBORZ
The Pyrenees mountain range forms a border between France and Spain, while the Alps mountain range forms a border between France and Italy.
The rockies
Himalayas
Elburz Mountains
The Alps form the border between France and Switzerland. They are one of the largest and highest mountain ranges in Europe, known for their beauty and popular for skiing and hiking.
The Carpathian Mountains.
The Himalayas form a natural border between India and China. Spanning five countries, including India and China, the Himalayas are the highest mountain range in the world. They serve as a physical barrier that separates the two countries.