Centre for Alternative Technology
Cambria Wyn quarry Ceinws/ Esgairgeiliog
Rhiwgreiddyn slate quarry
In the open chamber at Rhiwgreiddyn slate quarry
The tramway out of Rhiwgreiddyn quarry
Looking out from the entrance to Rhiwgreiddyn...
Looking in through the entrance to Rhiwgreiddyn...
No 9 An extract from Ray and Julia Gunn's...
ABERLLEFENNI SLATE QUARRY
CROESOR SLATE QUARRY
PENARTH SLATE QUARRY, CORWEN
RHOSYDD SLATE QUARRY
CLOGAU SLATE QUARRY
GORSEDDAU SLATE QUARRY
VIVIAN SLATE QUARRY
YR EIFL QUARRY; TREVOR QUARRY
DINORWIC SLATE QUARRY
MOEL FFERNA, SLATE MINE