By the 1870s, slate was one of Wales' major industries and Blaenau Ffestiniog had become an industrial town. The Dinorwig and Penrhyn quarries were the two largest slate quarries in the world ...

Bleanau Ffestiniog is a town in the county of Gywnedd. It is the slate capital of North Wales, and while the mining of slate is not at the level it once was it is still what the town is known for.