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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? ➡ Subscribe: https://www.youtube.com/user/NationalGeographic?sub_confirmation=1 About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://www.nationalgeographic.com/ Facebook: https://www.facebook.com/unsupportedbrowser Twitter: http://bit.ly/NatGeoTwitter Instagram: https://www.facebook.com/unsupportedbrowser Read more about Machu Picchu here: https://www.nationalgeographic.com/archaeology-and-history/archaeology/machu-picchu-mystery/?utm_rd= Machu Picchu 101 | National Geographic https://www.youtube.com/watch?v=cnMa-Sm9H4k National Geographic https://www.youtube.com/natgeo