I hope I am not too late but they are formed by the alps.
former yougoslavia
Italy's northern border is shared with Austria.
The ALPS MOUNTAINS form the northern border of Italy and help to separate it from Switzerland, Austria, and Germany to the north.
The Himalayan Mountains are what form India's northern Border.
It is Turkmenistan and Azerbaijan that border the northern part of Iran.
Rio Grande forms the Southern border of the United states.
The mountains on the northern border of Italy are known as the Alps. They make a natural boundary between Switzerland and Italy.
Nope... The Northern border of Italy meets the southern border with Switzerland. Germany is to the north of Switzerland.
The country that forms most of the northern border of the United States is Canada. The country directly to the south is Mexico.
The country that forms most of the northern border of the United States is Canada. The country directly to the south is Mexico.
The Himalayan Mountains are what form India's northern Border.
MONGOLIA makes up most of China's northern border.
The northern border of Italy is with Switzerland. Lake Maggiore forms part of this border. As both Italy and the Switzerland are members to the European Union, the land borders are presently open.