Whilst the original castle’s exact form and location remain something of a mystery, it may be the same structure referred to as ‘Aghkyne’ castle in 1574, when it was recorded as belonging to one Redmund McWalter. The site has undergone considerable transformation over the centuries; by 1837, a ‘handsome modern building’ had been erected on the ruins of the ancient castle, later becoming the 19th-century Headford Castle mansion that appeared on Ordnance Survey maps from 1920.

Today, what remains is a curious small square tower-like building measuring 5.5 metres in length and width, standing two storeys tall with a distinctive rectangular chimney on its southeast gable. The chimney itself is quite remarkable, decorated with two string courses and a moulded cap. Whilst most of the visible features, including the brick vaults over the ground and first floors, date from the 18th century, there are tantalising hints of earlier construction: a dressed stone round-headed doorway in the northwest gable and a crude slit window with chamfered jambs, likely reused from an older structure, in the southeast wall.

The building sits on the southeastern edge of an artificial platform, and according to historian Knox writing in 1901, it bears resemblance to the corner towers of Moygara Castle in County Sligo. He suggested this structure might represent a mural tower that once formed part of a bawn wall, though no surface traces of the main castle itself have survived. The site is particularly intriguing as it’s associated with what may have been a manorial village, adding another layer to its medieval significance in the landscape of North Galway.