The mines of the Isle of Man are located in some of the most remote sites to be found anywhere in Europe.
It was here that miners in Victorian times laboured to bring up lead and copper from deep underground.
On the island there are many examples of brilliant Victorian mine engineering.
At Laxey, the world's biggest water wheel was built to pump water from the lead mines.
In this video, Charles Guard visits these sites, and explores the remains of a once thriving industry.
He rediscovers the miles of channels round the hillsides and takes the cameras deep underground to see long-forgotten machines.