Ancient Civilizations (2017) Season 2 Episode 7
The intricate tunnels and cave systems throughout the American Southwest have been used for sacred ceremonies and military programs alike. Piece together Hopi and Zuni folklore with eyewitness accounts to unlock the secrets of the four corners and its history of extraterrestrial influence.
Serie: Ancient Civilizations (2017)
Episode Title: Ancient Cave Systems of the Four Corners
Air Date: 2018-03-13