Bronze Age rock art uncovered in Brecon Beacons
6 March 2014 Last updated at 08:18 GMT
Rare, prehistoric rock art which could be more than 4,000 years old has been discovered in the Brecon Beacons.
Experts claim the Bronze Age stone probably served as a way marker for farming communities.
National Park archaeologist Natalie Ward says similar stones have been found in other parts of Britain but they are thought to be rare in mid Wales.