What on Earth?
Mystery of the Welsh Mine (11x4)
Fecha de emisión: Jul 13, 2022
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.
- Estrenada: Feb 2015
- Episodios: 163
- Seguidores: 23
- En emisión
- Science Channel
- Martes a las 21