Professor Holley Moyes reveals how a drought caused the Maya to venture underground.
Subtitles: English
Starring:Dan Russell
Season 1
S01:E01 - Great Britain
The team examines the deepest shaft discovered in the UK: Titan.
S01:E02 - Gibraltar
The team learns more about the Rock's caves and tunnels; secrets are revealed.
S01:E03 - Slovenia
The team scans the volume of ice, providing data for scientists to assess climate change.
S01:E04 - Belize
Professor Holley Moyes reveals how a drought caused the Maya to venture underground.
S01:E05 - China
Uncovering the secrets of China's giant caves; a team maps Cloud Ladder Hall.
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