Cwmorthin Slate Mine, north Wales, UKCwmorthin Slate Mine, north Wales, UKCwmorthin Slate Mine, north Wales, UKCwmorthin Slate Mine, north Wales, UKCwmorthin Slate Mine, north Wales, UKCwmorthin Slate Mine, north Wales, UKCwmorthin Slate Mine, north Wales, UKCwmorthin Slate Mine, north Wales, UKTea pot left behind by the miners in Gaewern Slate Mine. North Wales, UKGaewern Slate Mine. North Wales, UK