Aired Tuesday 20 February,
1:00am - 2:00amon Yesterday
Underground Worlds
Series 2 Episode 5: Mystery of the Kentucky CaveExploring the vast 400-mile Mammoth Cave in Kentucky, USA. Plus, a newly constructed opening into a metal mine in Wales - untouched for over 70 years.
- Category
- Documentary
- Original air date
- 07/02/2022
Cast and crew
