Wrysgan Slate Quarry: Adit leading to the bottom of the workings where one can look up into a series of massive chambers. (Public)
These chambers are very wide with some huge collapses, unlike the chambers in Cwmorthin which tend to be much narrower. This gives Wrysgan a totally different "feel"
(Photo of Wrysgan Slate Quarry uploaded by dwarrowdelf. Please do not copy without permission).