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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? Find out in Season 10, Episode 56, "Machu Pichu." #ModernMarvels
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Follow Adam Richman as he travels the country and tries the most iconic and forgotten foods of the 1980s. Watch new episodes of Adam Eats the 80s Sundays at 10/9c on The History Channel.

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"Modern Marvels" goes beyond the basics to provide insight and history into things we wonder about and that impact our lives.

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