BRYNDYFI LEAD MINE; NEUADD LWYD LEAD MINE,...
VIVIAN SLATE QUARRY
RATGOED SLATE QUARRIES
GORSEDDAU SLATE QUARRY
BRYNPOSTEG LEAD MINE
ABERLLEFENNI SLATE QUARRY
MOEL FFERNA, SLATE MINE
YR EIFL QUARRY; TREVOR QUARRY
BERWYN SLATE QUARRY AND FIELD SYSTEM
BRONFLOYD LEAD MINE;BRYN LLWYD
PENLAN FACH MINE, YSBYTY YSTWYTH
CWMYSTWYTH LEAD MINES
BRYN-YR-AFR LEAD MINE
BWLCHGLAS MINE; OCHR LWYD MINE, EAST OF TALYBONT
CWMSYMLOG LEAD MINE (GENERAL);EAST DARREN LEAD...
