Fron-Boeth and Pant Mawr Quarries, Historical slate quarries in Gwynedd, Wales.
The quarries feature two interconnected mining sites on the western slopes of Moelwyn Mawr mountain at elevations between 1500 and 1700 feet.
Operations commenced around 1850 at Pant Mawr, later joined by Fron-Boeth in 1886, with both sites ceasing production during World War I.
The quarries represent Welsh industrial heritage through their pillar and chamber mining system, which characterized the Ffestiniog region's slate extraction methods.
Visitors can explore the preserved mill area, multiple open adits, and observe the remains of the steam-powered machinery used for slate processing.
The site contains Britain's highest two-pitch incline in slate quarrying, descending 1000 feet via two separate slopes for slate transportation.
Location: Gwynedd
Location: Merionethshire
GPS coordinates: 52.98336,-4.01858
Latest update: March 7, 2025 14:00
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