"Ancient Aliens" Underground Aliens (TV Episode 2010) Poster

(TV Series)

(2010)

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Storyline

If extraterrestrials influenced human history, can evidence of their existence be found in hidden tunnels and caverns around the world? Could a cave in Ecuador contain metallic books inscribed with secrets of alien technology? Was an ancient underground city in Turkey built with alien help... or as a refuge from an alien attack?

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