This chaotic site was once a small slate mine, worked underground from the 1870's until the 1920's. I ventured a little way in, down one of the adits, but it was very dangerous and my sense of self-preservation quickly cut in. Although closed in the twenties, the mine was re-opened by striking miners from Blaenau Ffestiniog in the 1980's. Another, altogether more destructive revival occurred in the 1990's, when, in the words of the Gazetteer of Welsh Slate Quarrying, it was "vigorously untopped". There are still a few signs of underground working, carefully fenced off, but any feeling of it having been a mine has long gone, along with the roofs to the chambers.
What the place does have is a strange, brooding atmosphere, helped by the deep flooded pit and the fabulously exposed rock strata. A location for a future series of "Dr Who", perhaps? It can be found by taking the Yspyty Ifan road over the Migneint from Llan Ffestiniog, not far from the junction with the Bala road. Llyn y Morwynion is also nearby.