Penrhyn Castle
ABERLLEFENNI SLATE QUARRY
MINERA LEAD MINES: MEADOW SHAFT LEAD MINE;CITY...
CROESOR SLATE QUARRY
PENARTH SLATE QUARRY, CORWEN
ESGAIR MWYN LEAD MINE, EARTHWORK COMPLEX
RHOSYDD SLATE QUARRY
CLOGAU SLATE QUARRY
BRYN-YR-ARIAN LEAD MINE [DISUSED], SE OF TRE&...
BRYNDYFI LEAD MINE; NEUADD LWYD LEAD MINE,...
POWELL'S LLYWERNOG MINE, PONTERWYD
GORSEDDAU SLATE QUARRY
VIVIAN SLATE QUARRY
YR EIFL QUARRY; TREVOR QUARRY
DINORWIC SLATE QUARRY
BWLCH GWYN LEAD MINE;GWAITH NEWYDD YSTUM TUEN
MINERA LEAD MINES: NEW MINERA LEAD MINE, MINERA
MOEL FFERNA, SLATE MINE