Ancient Aliens: Origins
Mysterious Underground Worlds
Season 1 Episode 5
A look at various underground structures, including Derinkuyu, a multi-level underground city in Turkey large enough to have sheltered up to 20,000 people, their animals and food stores and the Longyou Grottoes in China, believed to be over 15,000 years old. Plus, secret tunnels linked to Native American lore of the Ant and Snake People and ancient libraries from a lost civilization
Ancient Aliens: Origins airs on Sky History at 10:00 PM, Friday 7 February. (New, subtitles.)
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News ➝ Current Affairs
Documentary