AirDate: 2/7/2022 |
Overview: 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. |
Mystery of the Kentucky CaveShow: Underground Worlds --> Season: 2 - Season 2
AirDate: 2/7/2022
|
Overview: 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. |