Snowdonia National Park, Information Centre, Ty Meirion, Eldon Square, Dolgellau LL40 1PU, UK
About
Llechwedd Slate Mines at Blaenau Ffestiniog. Multi-award winning attraction, and one of the most popular in North Wales. Two separate underground tours describing the lives of the 19th Century miners. Plenty to see on the surface too. It's all done very well - this is a great place to spend a half day.