Driving along the B5106 there is an adit next to the road in between Betws and the turning for the farm. The hole next to the road has been back filled but just above is a shaft that is open at the top. I could not find this in the mines of the Gwydir forest books and wondered if anyone knew what it was and if the hole was worth descending.
There is also a small trial just above the lay bye about 500m away