Sinkholes

In Ripon, North Yorkshire, a woman recalls how a huge hole opened up next to her house more than 60 feet wide and 30 feet deep. In Florida, a sink hole appeared directly below a property, sucking a resident deep underground in the process.

Geologist Tom Backhouse investigates sinkholes caused by collapsed mine shafts, including one in Gosforth that opened up in front of a flat and led down to an abandoned coal mine. In Bury St Edmonds, a homeowner reveals how he is stuck in an unsellable house that is surrounded by sinkholes.

Documentary examining the underlying forces behind sinkholes, which can swallow streets, rip up motorways and even drag unfortunate bystanders to their deaths.