The water in it comes from Cwm Pwll-y-rhyd in flood plus sinks from the moor above, and water flows from it into the present gorge, firstly into Town Drain Cave and in high flood down the gorge as well. It has been dived to Cwm Pwll-y-rhyd.

L:100
V:

White Lady Cave, Railway Tunnel Cave


NGR: SN 91098 13676
290 m.asl

Powys , Northern Outcrop - Central (Penwyllt to Penderyn)
 map using leaflet map:
Rising Cave
Access On the road from Pont Nedd-Fechan to Ystradfellte turn off on Gwaen Bryn-Bwch to the fenced road and go for 1.5 miles to Pont Cwm Pwll-y-rhyd, Cross the bridge and go downstream for 330m to the further end of the ancient river course, dropping down into the present gorge, the cave entrance in immediately on one's right. Permission should be sought from Blaen Nedd Isaf farm.
Description The entrance is 5m wide and 3m high, oval well-scalloped and running parallel with the deserted gorge, with its ceiling at the level of the floor of the gorge to start. Only about 100m are available for non-divers, it is a wet cave.
History T. Braithwaite 1936; CDG 1960
Hydrology The water in it comes from Cwm Pwll-y-rhyd in flood plus sinks from the moor above, and water flows from it into the present gorge, firstly into Town Drain Cave and in high flood down the gorge as well. It has been dived to Cwm Pwll-y-rhyd. Tests
Conservation SSSI: 715 Biological records
Gallery

Brendan Marris
2010
Survey
SWCC Newsletter 33 p.9-11,1960. Grade 2.
References
Britain Underground, 1953
SWCC Our Caves. 3, p.8,9.
Caves and Caving 1(3) (BSA, 1938), Braithwaite, T.A.J., pp.93-98,
British Caver, 14, Hill A., p.95-105. 1946
Cullingford,C.H.D. (1951), Exploring Caves, p.71
HCC. NL 6, Taylor L.A. pp.9-10, 1953.
Brycheiniog 5, p.140, Thomas, T.M., 1959
SWCC Newsletter 33, De Graaf B & George C.O., pp.9-11,1960.
CDG. Rev. (1960) Buxton J.S., 19p, 1961.
CRG Biol.Supl. part 7, Hazelton M., 1961.
SWCC Newsletter 45, Hartwell J.M., p.20.1963.
Caves in Wales and Marches (Dalesman, 1963), Jenkins D.W. & Williams, A.M., 1st ed. p.48.
CDG nl 24, pp.24-25 (1972)
Brendan Marris Caves of South Wales
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Cambrian Cave Registry entry 442
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