Mystery of the Welsh Mine (S11E04)
S11E04
Satellites have detected remnants of ancient ruins alongside strange formations atop a mountain in Wales.
Show
What on Earth?
Episode
S11E04
Air Date
Jul 13, 2022
Season 11 Episodes
S11E01
Secret Soviet Spacecraft
S11E02
Range of Nazi Evil
S11E03
Doomsday Lair of Greece
S11E04
Mystery of the Welsh Mine
S11E05
Riddle of Sardinia Tower
S11E06
Circles of the High Kings
S11E07
Russia's Lightning Lab
S11E08
Poland's Secret Nazi Compound
S11E09
Holes of Dead Sea Destruction
S11E10
Ancient Rome's El Dorado