There are a few of them, and they are not related. Actually, not all border is separated by rivers.
Guadiana in the south-east and Minho in the north-west are some important rivers.
The Tagus River flows west from Spain through Portugal.
The Douro River runs from Spain through Portugal to the Atlantic Ocean.
No actual landforms separate the two countries, only in some areas does a river play influence in the border. The Spanish-Portuguese border is separated mostly by language and has been long in use throughout history.No actual landform separates the countries of Spain and Portugal, only in some areas of the border does a river play influence. The Spanish-Portuguese border is mostly separated by language and has been long in use throughout history.
The Tagus, Douro, and the Guadiana River all flow from Spain into Portugal then out to sea
Portugal is west of Spain, between Spain and the Atlantic Ocean.
Its Spain.
The Tagus River flows west from Spain through Portugal.
The Tagus is a river in Spain and Portugal. Tua is a river in northeastern Portugal.
It is in Spain and Portugal shares the tagus river with Spain....but it is mostly about Spain:d
The Douro River runs from Spain through Portugal to the Atlantic Ocean.
The Tagus River is a famous river in Spain, and is the country's longest river. It runs through Spain and Portugal, and is 645 miles in length.
The Pyrenees separate both Spain and Portugal from the rest of Europe.
Its source is in Spain, its mouth is in Portugal, near Lisbon.
No actual landforms separate the two countries, only in some areas does a river play influence in the border. The Spanish-Portuguese border is separated mostly by language and has been long in use throughout history.No actual landform separates the countries of Spain and Portugal, only in some areas of the border does a river play influence. The Spanish-Portuguese border is mostly separated by language and has been long in use throughout history.
Spain, Portugal.
Spain and Portugal.
As far as I am familiar, there is no Argus River in Spain. If, perhaps, you meant the Tagus River (Río Tajo in Spanish), the river has its source and most of its length in Spain, but its mouth is in Portugal.