Llechwedd Slate Caverns is a visitor attraction in Blaenau Ffestiniog, Gwynedd, Wales. Visitors can travel on the Miners' Tramway or descend into the Deep Mine, via a funicular railway, to explore the former Llechwedd slate quarry and learn how slate was extracted and processed and about the lives of the miners.
On the Miners' Tramway (opened in 1972) visitors ride for 800 metres through tunnels and caverns on a train hauled by a battery-electric locomotive.
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