source
spain
Source
Its source.
Its source is in Spain, its mouth is in Portugal, near Lisbon.
Its source is in Spain.
The Tagus River does have it source in Spain. Its source is Fuente de Garcia, which is located in the municipality of Frias de Albarracin, Spain. The Tagus River has a length of 645 miles.
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.
It begins in Spain & enters the Atlantic near Lisbon , Portugal.
The river Tagus (the Tagus) flows through Spain and has its mouth at Lisbon, Portugal.
Lisbon, Portugal.
It rises in the Sierra de Albarracin of Eastern Spain, at a point about 90 miles (150km) from the Mediterranean coast, and flows westward across Spain and Portugal for 626 miles (1007km) to empty into the Atlantic Ocean near Lisbon.
The source is where the river starts and the mouth is where it ends.
The source of a river is where the river starts.
a river gets wider from source to mouth a river gets deeper from source to mouth a rivers load gets smoother from source to mouth a rivers load gets smaller from source to mouth the velocity of a river stays the same from source to mouth
The source of a river is where it begins, the mouth of a river is where it enters the sea.