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Underground Worlds

Series 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.

Category
Documentary
Original air date
07/02/2022
Cast and crew
  • Jonny LeederDirector
  • Iain PatersonDirector
  • Chris JarmanNarrator