Porth yr Ogof
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The largest cave entrance in Wales, where the Afon Mellte flows into a wide riverbed cavern near Ystradfellte. Its accessible mouth and river passages draw walkers and cavers alike.
Where next?
Good to know
The largest cave entrance in Wales, where the Afon Mellte flows into a wide riverbed cavern near Ystradfellte. Its accessible mouth and river passages draw walkers and cavers alike.
Where next?
Where next?
