S1 E4: Episode 4 Preview | Mexico – Flooded Caves

Dive into a network of unexplored caves under the Yucatan Peninsula with Steve Backshall. After trekking through kilometers of scorpion-infested Mexican jungle to reach the caves, he faces the terror of being lost in an underwater silt cloud.
Aired: 2/5/2020 | 0:00:30
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