A unique journey to uncover the secrets of the underworld hidden in the depths of ancient caves and tunnels that have been subject to tens of thousands of years of accumulation, bearing the traces of nature and man.
- Season 1
5- Great Britain
From Titan's Cave, the largest vertical cave, to Wookey Hole... impressive discoveries in the caves of the British Isles.
4- Belize
Shocking beliefs and rituals are discovered by the Underworld team during their exploration of Mayan caves.
3- China
In China, a country full of huge caves, the team embarks on an exciting adventure to reach the Cloud Staircase" hall, one of the largest cave rooms in the world."
2- Slovenia
Dangerous adventures to explore the secrets of the world's oldest ice caves... What do Slovenia's caves hide?
1- Gibraltar
A magical and unexpected network of caves and tunnels holds wondrous secrets beneath the mighty Rock of Gibraltar.
