RHOSYDD SLATE QUARRY
VIVIAN SLATE QUARRY
SLATE QUARRY, CWM EBOL
CLOGAU SLATE QUARRY
ABERLLEFENNI SLATE QUARRY
GORSEDDAU SLATE QUARRY
BWLCH-YSTYLLEN LEAD MINE
BERWYN SLATE QUARRY AND FIELD SYSTEM
YR EIFL QUARRY; TREVOR QUARRY
RHIW-BACH SLATE QUARRY
CWMORTHIN SLATE QUARRY
BWLCH GWYN LEAD MINE;GWAITH NEWYDD YSTUM TUEN
MOEL FFERNA, SLATE MINE
BRYN-YR-ARIAN LEAD MINE [DISUSED], SE OF TRE'R...
PENARTH SLATE QUARRY, CORWEN
ESGAIR LLE;ESGAIR LLU LEAD MINE;GREAT WEST VAN...
BRONFLOYD LEAD MINE;BRYN LLWYD