South wall of Carreg Cennen Castle positioned on the top of limestone cliff precipice, Trapp, Brecon Beacons, Powys, UK. The castle has been in a ruinous state since 1462 and is under the care of Cadw, the Welsh Government historic environment service, however the estate is used as working farm land.  (photo by Andrew Aitchison / In pictures via Getty Images)
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