- Country United States
- Original language English
- Genres Documentary, Reality
- Runtime 45 minutes
- Total runtime 12 hours
- Status Ended
- Network Science Channel
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External links
TheTVDB page
IMDB page
TheMovieDB page -
Last update
29 juillet 2025 - 22:13
on 11 databases
Video : Secrets of the Underground
Scientist Rob Nelson investigates the strangest underground locations in the world.
