Black Figures of Cwmorthin
The disused Cwmorthin Slate Quarry can be found on the shore of Llyn Cwmorthin above Blaenau Ffestiniog. The following description of a strange experience was e-mailed into Mysterious Britain early in 2013 and I would be very interested to hear from anybody who could add more. “Start from Blaenau Ffestiniog.
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