Abercwmeiddaw quarry, Industrial quarry site in Corris, Merionethshire, Wales.
The abandoned quarry features extensive open pits carved into hillsides with remnants of Victorian-era extraction equipment and processing mills scattered throughout the rocky terrain.
Established around 1840, the quarry operated until 1938, extracting slate from the Broad Vein within the Rhiwlas Formation during Wales' industrial expansion period.
The site represents the heritage of Welsh slate workers who labored under difficult conditions, contributing to Britain's infrastructure development during the Victorian era.
Visitors should wear sturdy footwear and exercise caution when exploring the uneven terrain with loose stones, steep inclines, and remnants of old machinery.
The quarry featured experimental binocular tunnels created by a rotary tunneling machine in 1864, forming overlapping twin passages that provided access to deep slate deposits.
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