
TV-PG
2022
Science & Nature
Adventure & Survival
Mystery of the Welsh Mine
Season 11, Episode 4
: Satellite images capture monumental ruins surrounded by bizarre feather-shaped structures on a Welsh mountaintop; experts investigate and uncover a hidden tunnel containing the remains of an abandoned slate mine with an exploitative and deadly past.
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About the Series
What on Earth?
Hundreds of satellites orbit Earth and capture the world like it's never been seen before, sometimes revealing objects and phenomena that defy explanation. Explore these unusual images as scientists attempt to explain mysteries seen from space.

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4. Mystery of the Welsh Mine
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8. Poland's Secret Nazi Compound
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Season 11, Episode 4 - Mystery of the Welsh Mine
Release Year:
2022
Rating Information:
TV-PG
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Plans start at $9.99/month.