This time, Rob Bell travels to Northern England to discover the secrets beneath the surface. Discovering the deepest mine in Britain which includes an underground science facility, a purposely built air raid shelter used during WWII, a waterfall that's twice the height of Niagara Falls in Yorkshire, and a mysterious tunnel that was built over 200 years ago.
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This series follows Rob Bell as he travels across Britain to discover the most fascinating secrets that are hidden beneath the surface.
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