Attractions / Activities
Llanfair Slate Caverns
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Attraction
The slate in this mine, which is found in veins between layers of ancient Pre-Cambrian rocks, is among the oldest in the world. Many industrial towns in Britain and Ireland have the original roofs made of Llanfair slate.
Tŷ Mawr Ynysypandy
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Attraction
Gorseddau quarry in Cwmstradllyn had been worked on a small scale since 1836 but was actively developed from 1854.
Cwm Ystradllyn, Garndolbenmaen, Gwynedd, LL51 9AZ