Modern marvels. Season 10, Episode 55, Machu Picchu / written and produced by Luke Ellis ; produced and created by Bruce Nash ; produced by Actuality Productions, Inc. for the History Channel.
The engineering marvel Machu Picchu sits perched on a ridge in the Peruvian Andes. Originally built by the Incas, this magnificent structure remains a mystery. Was it an observatory? Pleasure retreat? Fortress? This program presents the most current theories.
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