That this one exists at all is known only because of a handful of records and a name on an old map. It is not visible at ground level, has not been for well over a century, and the ground above it now vibrates with the weight of departing aircraft.

The site appears on the 1837 Ordnance Survey six-inch map, where it is marked simply as "fort", the conventional notation surveyors used for such earthworks during that period of systematic mapping across Ireland. By then, however, the structure was already compromised. It had been partly demolished in 1822, and whatever remained was cleared away entirely in 1873, a date recorded by Healy in 1975. The land around Cloghran, a townland north of the city, was subsequently absorbed into the expanding infrastructure of the twentieth century, and the area where the ringfort once stood was eventually incorporated into an extension to the recently constructed runway at Dublin Airport.

There is nothing to see here in the conventional sense, and that is precisely what makes the site worth knowing about. It represents a category of monument that is easy to overlook in discussions of Irish archaeology, the ones that are gone not through neglect or disaster but through the slow accumulation of agricultural clearance, development, and practical necessity. If you find yourself in the area, the closest you can get is the perimeter road skirting the airport's northern edge near Cloghran, from which the runway itself is just visible beyond the boundary fencing. The ringfort lies somewhere out there, underneath, noted in the Sites and Monuments Record and compiled by archaeologist Geraldine Stout, its coordinates fixed in a database even as the ground above it is put to an entirely different use.