Deganwy Castle is an ancient Welsh royal site, but sadly this substantial stone motte and bailey fortress, has been built and dismantled three times. The two natural mottes flank a middle lower bailey, which has the fragments of a mighty twin towered gatehouse that once flanked its southern curtain wall, with a small gatehouse guarding its northern banks and ditches. On the eastern motte are the foundations of Mansell's Tower, a great D-shaped keep and on the western motte are the fragments of a barbican, a low curtain wall, flanked by a solid round turret, a hall and a keep. One mile south is Conwy Castle.