2 Season
20 Episode
Underground Worlds - Season 2 Episode 5 Mystery of the Kentucky Cave
Exploring 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.
- Year : 2022
- Country : United Kingdom
- Genre : Documentary
- Studio : U&Yesterday
- Keyword :
- Director :
- Cast :
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