Porth yr Ogof - Main Entrance  (Cave / Sink)

 

Location SN 92810 12410.  Northern Outcrop - Central (Penwyllt to Penderyn), Powys
Updated
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Elevation (m) 229 
Length (m)
2220     
OS Map No.
1:50000
160 
1:25000
OL12 
1:10000
 
Access The cave is a well known tourist spot and is marked on OS maps. From Ystradfellte, take the road towards Pont Nedd Fechan. After less than 800 metres, a single track road leads off on the left. The road descends to where a large car park is situated above the cave. 
Description A large entrance, which takes the complete flow of the Mellte can be followed for 230 metres, but care is needed with the downstream sump as the current is strong. An extensive dry series leads off a chamber to the right of the entrance. The cave is visited daily by Adventure Groups. There are no less than 15 entrances / exits to the cave.
NB. The resurgence is extremely dangerous and 10 people have drowned in the resurgence pool as of 2002. 
Condition  
Bibliography Lloyd, E. De Fossilium Marinorum E Foliorom Mineralium Origine, Published in Lithophylach Britannici Ichnographia (Oxford), 1970
Makin, B. The Scenery, antiquities and Biography of South Wales, 2ed, 1807
Anon. Cambrian Travellers Club, 1813
Young, W. Guide to the Beauties of Glynneath, (London), 1835
Roscoe, T. Wanderings in South Wales (London), 1836
Trans. Card. Nat. Soc. 3, 1872
Trans. Card. Nat. Soc. 20, (2), 128, 1888
Trans. Card. Nat. Soc. 21, (1), 40-41, 1889
SWCC Newsletter 19, 7-8, 1957
SWCC Newsletter 10, 1954. Flooding
SWCC Newsletter 20, 1, 1957 R.Smith
SWCC Newsletter 45, 20, 1963 J.Hartwell
North, F.J. River Scenery at the Head of the Vale of Neath (Nat.Mus.Wales), 1ed, 1932
Caves and Caving 1, (3), 93-98, 1938.
British Caver 4, 13-19, 1939. Extract from Glamorgan, 1938
British Caver 6, 44-53, 1940
YRC Journal 7, (23), 52-61, 1938. Early description
HCC Newsletter 2, 2-3, 1951
HCC Newsletter 3, 6, 1952
Jenkins, D.W. & Williams, A.M. Caves of Wales and the Marches. Dalesman. 1st Ed.1963
Stratford, T. Caves of South Wales. 1995
Proceedings of UBSS Vol.12, No.2, 1970 Standing, P.A. and Lloyd, O.C. 
Survey Caves and Caving 1, (3), 93-98, 1938.
CRG 1959
UBSS 1968 
Found / Dug By Wessex CC 1937 
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