Criccieth Castle is a ruined thirteenth-century castle in Criccieth, Gwynedd, Wales. It is located on a rocky headland overlooking Tremadog Bay and consists of an inner ward almost surrounded by an outer ward. The twin-towered inner gatehouse is the most prominent remaining feature and survives to almost its full height, as does the inner curtain wall. The o…Criccieth Castle is a ruined thirteenth-century castle in Criccieth, Gwynedd, Wales. It is located on a rocky headland overlooking Tremadog Bay and consists of an inner ward almost surrounded by an outer ward. The twin-towered inner gatehouse is the most prominent remaining feature and survives to almost its full height, as does the inner curtain wall. The outer curtain wall, the inner ward buildings, and the castle's other three towers are significantly more ruinous, and in places survive only as foundations.