Looking at these maps, I'd say it was a tossup between Italy and Portugal.
http://www.geographicguide.net/europe/maps-europe/physical.htm
(Broken Link Removed)
I'd vote for Portugal as being least mountainous.
This is the least mountainous country of Southern Europe.
1) Greece
2) Italy
3) Portugal
4) Spain
in my book, it says all of them are mountainous.
help?
2 answers
Portugal is the least mountainous.
Italy has the southern Alp); Spain has the Pyrenees, and Greece has some high mountains (like Mt. Olympus and Mt. Parnassus, near Delphi) in a range called the Pindos. The Matterhorn is on the Italian border.
Italy has the southern Alp); Spain has the Pyrenees, and Greece has some high mountains (like Mt. Olympus and Mt. Parnassus, near Delphi) in a range called the Pindos. The Matterhorn is on the Italian border.