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Machu Picchu

Episode 4 | 52m 40s

Join a team of laser-scanning experts in the Inca city to answer three main questions. How did the Inca build a city atop a mountain ridge? How were the terraces constructed? How did they supply water to the city?

Aired: 12/09/15

Expired: 01/08/16

Rating: TV-PG

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