Extreme China

6:00 PM to 7:00 PM

Friday 7 March

Hanzhong Underground

Season 1 Episode 3 of 3

Ben Horton explores one of the world's biggest sinkholes in Hanzhong, rappelling 180 metres down into a massive and barely explored underground cave system

Extreme China airs on National Geographic Channel HD at 6:00 PM, Friday 7 March.

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