, Northern Outcrop - Central (Penwyllt to Penderyn)
map using leaflet map:
Both entrances to the Cave lie at the rear of Rhongyr Isaf. At the rear of the garden, a stile on the left leads to a group of dolines, one of which contains an entrance. A second entrance which lies at the rear of the garden and is surrounded by a wooden fence is the safer and more pleasant way in.
An entrance series of awkward drops through thin beds to a stream which can be followed for a distance. This then leads via a 10 metre pitch to an impressive chamber enlarged on a junction of joints, with the stream entering as a waterfall higher in the roof. The passage continues for 750 metres until a sump is reached.
SWCC in 1950. Extended by Cavers at Minerva in 1985
G.Evans, G.Mitchell, M.Woodfield, S.Davies 2007
Caves in Wales and the Marches (Dalesman), Jenkins, D.W. & Williams, A.M., 1st Ed.1963, p.31