National Geographic Explorer Albert Lin travels to the mountains of Peru to discover the origins of its most famous site, Machu Picchu. Using LiDAR technology, he finds proof of the people who came before the Inca and treks into the mountains to find their homes and ceremonial sites. Lin reveals that the Inca city may have been inspired by another, even older civilization.

Originally released by National Geographic, 2019. Streaming video file encoded with permission for digital streaming by Infobase on January 05, 2023.