This site consists of two caves located very close together. A small linear cave is located to the southwest of the large cave entrance to the main cave. The two sites are not connected underground, but once must have been related.
Cave 1 - 70m | Cave 2 - 30m
OSGB Grid References
Cave 1 - SN 92132 14626 | Cave 2 - SN 92107 14619
The cave entrances are very prominent and will have long been known and visited.
The caves are located on the edge of Ystradfellte common overlooking Blean Neath Isaf Farm and the Nedd Fechan valley below. The caves are best approached from Ystradfellte village following the lane up to the common, first heading to Carnau Gwynion, following the track through the gate in the wall. The track then enters a shallow valley and starts to veer northeast. A limekiln can be seen on the eastern side of the track with the caves located on the higher ground just above it. An alternative route is to approach the common from the public footpath that heads up to the common from the road between Bridge Cave and Blaen Nedd Isaf Farm.
Ystradfellte area Google map showing the location of Ogofau Gwynion and other caves in the area.
No known access restrictions.
Cave Number 1 is the most obvious of the pair and can be clearly seen from the track that runs to the top of the limekiln. This has a large entrance leading to an open chamber which acts as a sheep shelter. This chamber then leads to short dig through to an inner chamber beyond. This chamber has two ways off, the first on the left continues for about 25 metres until it becomes too tight to progress. The second route off the inner chamber is a very tight squeeze on the right. This is shown on the survey to lead to a further chamber.
Cave Number 2 is located to the southwest of the main cave and the small entrance leads to a hands and knees crawl that can be followed for about 30 metres becoming smaller until too tight for further progress.
No tackle is required
Cambrian Cave Registry for Ogof Gwynion Number 1
Cambrian Cave Registry for Ogof Gwynion Number 2
Caves of the Mellte Valley
| Allan C. Ockenden
| No.37 (1989) | Croydon Caving Club
Caves of South Wales
| Tim Stratford | Published by Cordee
The Mellte Valley
| Frank Baguley | Y Ddraig Goch (Red Dragon) | Cambrian Caving Council | 1978/79
The Little Neath River Cave
| P.A.Standing | University of Bristol Spelaeological Society
You are strongly advised not to feed the dragon that lives in the larger of the two caves.
The photographs and information of this page has been provided to help cavers planning trips. Caving can be a dangerous activity, if you are interested in exploring caves please join a caving club so you can enjoy a safe introduction to this sport. Local caving clubs are listed on the links page
or you can visit the 'New To Caving' website
for more options.
If you feel that any of the information is incorrect or should be updated please contact us.