Slovakia and Hungary
The Atlanitic
The Danube River forms the border of some countries. They are Romania, Bulgaria, Hungary, Serbia, Slovakia, Austria and Germany.
The Tatras.
At last its h2o
The Limpopo forms that border between Zimbabwe and South Africa.
The Colorado River forms the border between Arizona and California
The Limpopo forms that border between Zimbabwe and South Africa.
The border between Mississippi on the west and Arkansas on the east is the Mississippi River. It also forms the border between Arkansas and Tennessee.
The Mekong River forms a border between Thailand and Laos.
the river that forms the border between India and Kentucky is the Mississippi River.
The Missouri River forms the border between Iowa and Nebraska.