Cilgwyn quarry (original) (raw)

Cilgwyn quarry is a slate quarry located on the north edge of the Nantlle Vale, in North Wales. It is one of the earliest slate quarries in Great Britain, being worked as early as the 12th century. King Edward I of England was reputed to have stayed in a house roofed by Cilgwyn slates, during the Welsh wars of independence. It is one of the major slate quarries in the Nantlle Valley area.