Harlech Castle is an imposing Edwardian stone concentric enclosure fortress, surrounded by cliffs and deep rock-cut ditches. The high curtain wall of the inner ward, is defended on the angles by huge circular towers and dominated by the massive three storey great gatehouse. The lower outer curtain wall is flanked by open bastions, twin-turreted gateways and the foundations of two 14th century square bridge towers. At the foot of the cliffs, a water gate is defended by two artillery platforms and an upper gate.