VIVIAN SLATE QUARRY
DINORWIC SLATE QUARRY
LLYS DINORWIC
GLASCOED, PONT RHYTHALLT, LLANRUG; GLASCOED HALL
DEINIOLEN
RECTANGULAR EARTHWORK 110M NW OF COED TY MAWR
CASTELL, EARTHWORK
DINAS DINORWIG HILLFORT
TAN-Y-COED, HUT GROUP
DINORWIC SLATE QUARRY WORKSHOPS;WELSH SLATE...