Carreg Cannen is a famous Welsh castle near the town of Trap in the southwestern part of Wales. Surrounded by massive limestone rock formations, the 12th century castle, which has not been functional since the 15th century, has a daunting appearance. Contributor Nethan Jermy shot this impressive aerial video of the great ruins using a DJI Phantom drone. The castle, located in Brecon Beacons National Park, was named by Touropia as one of the top 10 Welsh castles. It's in Carmarthenshire, one of the counties of southwestern Wales.