, Northern Outcrop - Central (Penwyllt to Penderyn)
map using leaflet map:
Permission should be sought from Blaen Nedd Isaf farm.
The entrance is in a shallow depression a few metres South of the bridge across the Nedd Fechan.
A crawling entrance passage leads via an unstable boulder choke to a winding streamway rift into the main passage which ends in a sump. The sump is 50 metres long and leads to Little Neath River cave (Ogof Nedd Fechan).
The cave is actually a part of the Little Neath River Cave.
SWCC 1947. Extended by UBSS, 1967.
British Caver 17, 95-103, 1947
British Caver 19, 79-81, 84, 87, 1947. Note on survey
HCC Newsletter 2, 11-13, 1951
Cullingford,C.H.D. (1951), Exploring Caves, p.71
SWCC Our Caves No.3. Location, description and Survey
SWCC Newsletter 3, Accident Report
MNRC Newsletter 23, 3-6, 1961. Map of sinks above and below cave.
Caves in Wales and the Marches (Dalesman), Jenkins, D.W. & Williams, A.M., 1st Ed.1963
Caves of South Wales, Stratford, T. , 1995
Descent 222 p.11, Martyn Farr, Access and rock fall