Llechwedd Slate Caverns

The Earth. One slice at a time.

While the south Welsh were busy mining for iron and coal, and quarrying for limestone, the north Welsh were mining for rock. North Wales contains several mines where strong rocks like slate and limestone were mined. Strong enough that the mines do not rely on supports to hold the roof up, and where the size of the caverns is limited only by what the miners could remove.

We are here to see slate mines. In case you are interested, slate is shale (compacted mud) that has been heated by volcanic activity (so it is a metamorphic rock).