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The Andes curve like a vast wall down the western side of South America.
They form the longest mountain chain in the world: about 5,500 miles
(8,900 km). Only the Himalaya Mountains of Asia rise higher. Forty-
two Andean peaks are taller than Mount McKinley, North America's tallest
mountain. The highest peak in the Andes and in the Western Hemisphere
is Aconcagua, in Argentina. It rises to a height of 22,834 feet (6,
960 m).
Fingers of the Andes almost touch the Caribbean Sea in the north.
Three separate ranges come together in Colombia. The Andes then continue
south through Ecuador and Peru, become widest in Bolivia and border
Chile on ...