Cefn Onn Slate Quarry
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Cefn Onn Slate Quarry
Cefn Onn Slate Quarry in Caerphilly, Rudry.
Cefn Onn Slate Quarry
Land use
quarry
Caerphilly Tunnel
Air Shaft Building
Air Shaft
Coed Tranch-yr-Hebog