Machu Picchu 101 | National Geographic

09/02/17 12:00
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Machu Picchu is a testament to the power and ingenuity of the Inca empire. Built without the use of mortar, metal tools, or the wheel, Machu Picchu stands as an archaeological wonder of the ancient world. But why was it built—and deserted?
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Machu Picchu 101 | National Geographic
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