![](http://www.alamy.com/thumbs/6/9871D38B-FD50-46BE-8564-44004375CBD7/2D6MJ28.jpg)
Cave at Porth yr Ogof, which has a river flowing into it.
This is part of a hiking route in the national park at Wales
Size: 4160px × 6240px
Location: Ystradfellte, Aberdare, Wales
Photo credit: © Samuel Garcia / Alamy / Afripics
License: Royalty Free
Model Released: No
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