2 Season
20 Episode
Mysteries of the Outdoors - Season 2 Episode 5
Mysterious lights, mechanical sounds from deep within the Earth and the disappearance of dozens of aircraft over the Great Smoky Mountains National Park could be evidence of a powerful secret society with an underground base in the area.
- annos singulos: 2017
- Patriam:
- genus: Documentary
- Studio: Travel Channel
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- Director:
- cast: