Morgan's Mine is an abandoned mine located within Culdee Fell Hill and situated north of Great Waterton. The mine had been closed for many years, and many of the shafts have been flooded. The wooden trestles supporting the track have also become shaky and unsafe.
Thomas once went down the mine to retrieve a runaway truck, but went down the wrong track and fell down into one of the flooded shafts. He was trapped inside the mine for nearly a whole day, but eventually managed to get out.