Underground at Dolaucothi gold mine
Dolaucothi gold mine
Tuyere at Cyfarthfa Ironworks
Blowing arch at Cyfarthfa Ironworks
Close up of tuyere at Cyfarthfa Ironworks
Blast passage at Cyfarthfa Ironworks
Blast furnace at Coed Ithel
Blast furnace at Brymbo steelworks
Modern blast furnace at Brymbo steelworks
Boundry marker at Pwll Du Quarry
Blast furnaces at Blaenavon Ironworks
Coke ovens at Blaenavon Ironworks