Northwest of Spain is the Bay of Biscay. There is no land there on which to have a border.
the pyrenees
Spain is the only country to border Portugal to the east.
France is on the northeastern Spanish border.
France - although Andorra lies along that border - between Spain and France - nearly all of the border is with France.
France is on the northeastern Spanish border.
If you mean "border", then France is the north-eastern neighbor of Spain.
France, I believe. The geographic landform at this area would be the Apennies.
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.
Spain's borders are made up of France and Portugal. The capital of Spain Madrid. France border's Spain along it's northeast border.
The Pyrenees.
California's southern border is shared with the country of Mexico.