Dramatically perched atop a steep limestone crag high above the River Cennen are the brooding ruins of Wales' ultimate romantic castle, visible for miles in every direction. Originally a Welsh castle, the current structure dates to Edward I's conquest of Wales in the late 13th century. It was partially dismantled in 1462 during the War of the Roses. On a working farm of the same name, Carreg Cennen is well signposted from the A483 heading south from Llandeilo.
The castle's most unusual feature is a stone-vaulted passage running along the top of the sheer southern cliff, which leads down to a long, narrow natural cave; bring a torch or hire one (£1.50) from the ticket office. Next to the ticket office there's also a 12th-century longhouse (a kind of elongated barn in which people lived with their livestock), filled with darting swallows and the ephemera of rural times past.
