In the 1970s, workers digging a ditch in Mexico City unearthed a stone decorated in relief--that discovery led to bigger finds including the Great Temple of Tenochtitlan, in Season 4, Episode 10, "Secrets of the Aztec Empire". #AncientMysteries Subscribe for more from Ancient Mysteries and other great HISTORY shows: histv.co/SubscribeToHistory Check out exclusive HISTORY content: History Newsletter - histv.co/newsletter Website - histv.co/History Facebook - histv.co/Facebook Twitter - histv.co/Twitter "Ancient Mysteries" is a series of one-hour documentaries exploring archaeological, historical, and cultural mysteries of the ancient past. HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network's all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.

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