The 49th Parallel.
Canada forms the northern border of the contiguous 48 states of the United States.
The Drakensberg mountain range runs along the eastern coast of South Africa. It also forms the eastern border of the landlocked country Lesotho.
The ALPS MOUNTAINS form the northern border of Italy and help to separate it from Switzerland, Austria, and Germany to the north.
The 49th parallel of latitude forms the border between Canada and the US from Lake of the Woods to the Georgia Strait. The 45th parallel of latitude also forms part of the border between Canada and the US along the northern boundaries of the states of New York, Vermont and New Hampshire.
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 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.
MONGOLIA makes up most of China's northern border.
The Himalayan Mountains are what form India's northern Border.
Canada
Canada
Columbus River
Canada
This is the river Danube.