Link to Ancient aliens (T2): 4- Underground aliens documentary
Documentary Description
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? Rumors of the U.S.
military working alongside aliens in a secret base inside a mesa in New
Mexico continue to swirl, Native American legends mention strange
inner-Earth beings, and recent archaeological discoveries in the Yucatan
may point to an extraterrestrial reality behind.