Structural engineer Steve Burrows scans the sacred Inca city of Machu Picchu using 3D laser technology. His three main questions: How did the Inca build a city atop a mountain? How were the terraces constructed? And how did they supply water to the city?

• DirectorTom Stubberfield
• Release9 December 2015
• GenreDocumentary
• Duration0h
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  Atlantic Productions, France Télévisions