What on Earth? Season 11 Episode 4
Episode Title: Mystery of the Welsh Mine
Genre:
Documentary
Countries:
,
Airing Date: July 13, 2022
Runtime:60 mins
IMDb Rating:
Watch What on Earth? Season 11 Episode 4 full movie online free in HD with English subtitles – no download needed.
Satellite images capture monumental ruins surrounded by bizarre feather-shaped structures on a Welsh mountaintop; experts investigate a hidden tunnel containing the remains of an abandoned slate mine with an exploitative and deadly past.