Flint Castle is a late thirteenth-century stone keep and enclosure castle built by Edward I.
Commanding the site at one corner of the rectangular inner ward, and isolated by its own ditch, is an unique cylindrical great tower. The other three corners of the inner ward have substantial round flanking towers, which projected into the Dee estuary. The large walled outer ward is unflanked with a large ditch in front and a revetted cross-ditch at the back, guarding the small inner gatehouse, all fed by the tidal waters of the River Dee.
Flint Castle is located in the town centre, off Castle Dyke Street.