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Carreg Cennen, Wales
Built atop a limestone precipice in Brecon Beacons National Park in 1197, Carreg Cennen has roots dating back to prehistoric times. It’s thought the site was used as an Iron Age hill fort and Roman coins have been found here. The remains standing today date from the 13th century, the castle having been reduced to ruins by hundreds of Yorkists in 1462 during the War of the Roses when it was being used as a Lancastrian stronghold. The sheer cliff faces on all sides had previously made Carreg Cennen pretty much impenetrable to invaders.
