© Chelsea Spelaeological Society - Updated January 2022
BRYNEGLWYS SLATE MINE
This underground slate quarry lies above the village of Abergynolwyn in mid-Wales. Active from 1840s for a century, the workings are extensive and can be explored via the CAL access scheme for entry on to underground sites owned by the Welsh Government or NRW. Photos by Stuart France.
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Caving in Wales,
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