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The team use long boats to journey up the Marang River into the heart of the Gergaji Karst Mountains
The team use long boats to journey up the Marang River into the heart of the Gergaji Karst Mountains

Borneo - Dark Shadow

Follow Steve Backshall as he drops down a sinkhole to explore a series of underground Bornean caves threatened by deforestation and limestone quarrying. The journey may lead to the potential to explore other undiscovered subterranean worlds.

Rating: 
TVPG
Length: 
56 minutes
Closed Caption: 
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