Secrets in the Dark
Tower of Skulls
Season 1 Episode 2
How, in 2015, archeologists announced the discovery of the Huey Tzompantli, a 15th-century tower of more than 650 skulls, in the archeological zone of the Templo Mayor in Mexico City
Secrets in the Dark airs on Sky History 2 HD at 9:00 PM, Sunday 22 February. (Subtitles.)
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