the Ural Mountains as well as the Caucus Mountains.
Rivers, mountain ranges, oceans, etc. Those are considered "natural boundaries".
The Alps mountain range forms a natural boundary between France and Italy.
The Mississippi River serves as the natural boundary between Mississippi and Louisiana.
Australia's natural boundry is the ocean.
Natural
Only two mountain ranges separate the continents: Ural & Caucus Mountains.
The Ural Mountains stretch about 2,500 km from north to south, forming a natural boundary between Europe and Asia. They are considered the conventional boundary marking the separation of the two continents.
Lake Victoria acts as a boundary between Tanzania, Uganda, and Kenya. Another natural boundary between these countries is the Kagera River.
The Ural and Caucasus Mountains form part of the natural boundary between Europe and Asia.
The Ural and Caucasus Mountains form part of the natural boundary between Europe and Asia.
Baffin Bay forms a natural boundary between Greenland (Denmark) and Canada.