Digging into Liverpool's mystery tunnels
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Digging into Liverpool's secret tunnels

Below Liverpool's streets lies a 200-year-old tunnel network that confounds the experts.

The Williamson Tunnels could stretch for miles. No-one is sure.

Every week, a group of volunteers digs through the rubble in an attempt to uncover their secrets.

Video Journalist: Dan Curtis

  • 04 Nov 2016