The entrance to Porth yr Ogof cave system, Ystradfellte, Brecon Beacons, (Bannau Brycheniog) Wales, December.

Size: 4032px × 3024px
Photo credit: © Jeff Tucker / Stockimo / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: beacons, brecon, cave, danger, disappearing, enter, entrance, holing, limestone, mellte, ogof, opening, porth, pot, river, stockimo, system, underground, unknown, wales, welsh, yr, ystradfellte