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 Mississippi River forms Arkansas' eastern border.
The Mississippi river is what forms Arkansas eastern border
The Mississippi River.
Spain is the only country to border Portugal to the east.
The Mekong River
Mountains are the geographical feature that forms most of the eastern border of Tennessee. The Blue Ridge Mountains lie at the border between Tennessee and North Carolina.
The Ural Mountains
The Mississippi River forms Arkansas' eastern border.
The Mississippi river is what forms Arkansas eastern border
Northwest of Spain is the Bay of Biscay. There is no land there on which to have a border.
the pyrenees
what ever
Mississippi river
The Ural Mountains
what geographic
what natural feature forms mississippi's western border
A physical feature that forms part of the border of New York State is Lake Ontario. If you mean the border around New York City, a physical feature would be the Hudson River.