Rhosydd Slate Quarry - Blaenau Ffestiniog
A 19th-century slate quarry, known for its extensive underground workings and rugged mountain setting.
Maenofferen Slate Mine - Blaenau Ffestiniog
Maenofferen Slate Mine in Blaenau Ffestiniog is a historic Welsh quarry that grew into a major slate producer in the 19th century.