A mountain or a river formed the border to our world.

Every day, he has to cross a river that forms the border between the two countries.

A portion of the river forms the international border between the two countries.

A number of pillars are built in order to form the border among the two states.

The city is named for the river that forms its eastern border.

For much of its length, it forms the border between the two departments.

The river Rhine forms the district's border in the south.

The N145 road forms the northern border of the commune.

The south border of the town is formed by the river Linge.

The Luga itself forms the southern border of the district.