What on Earth? S11E4: Mystery of the Welsh Mine
- Aired: 2022-07-13
- Time: 21:00:00
- Runtime: 60 minutes
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Overview
Satellite images capture monumental ruins surrounded by bizarre feather-shaped structures on a northern Welsh mountaintop. Experts investigate a hidden tunnel containing the remains of an abandoned slate mine from the 18th-19th Centuries with an exploitative and deadly past of hazardous working conditions and low pay for miners, which included children.