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Secrets of the Underground 1

IMDb 6.8 60 min/episode
Using cutting-edge technologies such as ground penetrating radar (GPR), LIDAR (Light Detection and Ranging), and 3-D imaging, scientists research fascinating underworlds of secret tunnel networks, ancient structures, and bizarre geological occurrences that offer glimpses into our history.
Genre:
Documentary
Stars:
Rob Nelson
Director:
...
Country:
United States
Rating:
7.3 / 18 times
Release:
2017-02-11
Quality:
HD

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