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![Porth yr Ogof caveNear Ystradfellte in the Brecon Beacons National Park, Wales - the biggest cave entrance in Wales through which the river Mellte flows.
Scan-130818-0002+wm_1000w.jpg](_data/i/upload/2013/08/18/20130818230829-888fa0a5-me.jpg)
Porth yr Ogof cave
Near Ystradfellte in the Brecon Beacons National Park, Wales - the biggest cave entrance in Wales through which the river Mellte flows.
- Author
- John Kendrick
- Created on
- Saturday 30 April 1977
- Created
- Posted on
- Sunday 18 August 2013
- Tags
- caves, Ystradfellte
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- 1660
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