I have not been up to Esgair Mwyn for a couple years now, after a scrappy from south Wales vandalised and stole most of the machinery still on site in broad daylight. It hurts to go back now, especially since my family used to work underground there and seeing the place in its current state, but I must admit I have never been underground there myself. The Penmynydd Shaft above the mill still had an iron ladder disappearing down it a few years ago, but am not sure of the state of the workings further down. The adit portal has been collapsed since the 1980s at least, after its brief reopening and re-railing by G W Hall during the 40s/50s. The only way down into the workings now is via Penmynydd Shaft I believe (75 fms deep), since I seem to remember Penmor Shaft (102 fathoms deep) being filled at surface.