In this episode, Rob explores two natural wonders in the Yorkshire Dales - a mile of caves and one of Britain's deepest potholes. In Stockport, Rob learns how its unique geology made it the perfect spot to build the country's largest air-raid shelter and he discovers the incredible depths that are being plumbed to retrieve agricultural fertiliser.
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Underground Britain - 1x03 North Of England
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired Nov 06, 2014
- Episode 1x03
- Show special No
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