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 Blaze (Freeview) at 11:00 PM, Wednesday 22 July.
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