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Habitats of the Andes Mountains
Great general information about the Andes Mountains. Excellent photos to go along with the info.
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Ecuador Explorer: The Andes
Detailed information about individual cities of the Andes Mountains.
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Peakbagger: Mt. Aconcagua
Description and climbing notes about Mt. Aconcagua in Argentina. Includes a detailed description, notes, pictures, and links. Good informational site.