The spectacular Carreg Cennen Castle is unusually privately owned but managed by CADW (members get free access otherwise there is a small fee).
Gorgeous plunging cliffs meant anyone attacking the place might as well have signed their own death warrants. The chances of returning alive were slim.
Carreg Cennen’s defences exploited the natural environment to great effect, glued to the sheer cliff-face on all sides. The stronghold led a chequered life going between Welsh and English ownership in a feuding past.