Penrhyn Quarry, Slate quarry in Bethesda, United Kingdom.
The quarry extends for 1.6 kilometers in length and reaches a depth of 370 meters, featuring multiple extraction levels carved into the mountain slopes.
Richard Pennant initiated large-scale slate extraction operations at the site during the 1770s, transforming it into the largest slate quarry worldwide by the 1800s.
The quarry witnessed a three-year labor strike from 1900 to 1903, with local houses displaying signs indicating support for workers through window messages.
The site currently operates under Welsh Slate Ltd management, continuing to extract and process slate while incorporating modern industrial techniques and safety standards.
A section of the former extraction area now contains Velocity 2, a zip line installation that crosses over partially submerged quarry sections.
Location: Bethesda
GPS coordinates: 53.16700,-4.06700
Latest update: March 3, 2025 11:43
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