There is nothing to see at Ballynafagh, and that, in its own way, is precisely the point. Somewhere beneath an unremarkable expanse of improved tillage in County Kildare lies what was once a ringfort, a type of enclosed farmstead common across early medieval Ireland, typically consisting of an earthen bank and an outer fosse, or ditch, encircling a domestic interior. The fosse at Ballynafagh would have sat just inside the outer edge of a roughly circular enclosure measuring approximately fifty metres in external diameter. Today, no trace of any of this is visible at ground level.

The site was described in 1955 as defined by traces of an earthen bank and its surrounding fosse, already faint even then, positioned near the bottom of a long, gently south-facing slope. The field boundaries that once subdivided this landscape, and which were still legible on the Ordnance Survey six-inch map of 1911, have since been removed entirely, consolidating the area into a single large field. That act of agricultural reorganisation, repeated across thousands of Irish townlands during the twentieth century, effectively erased the last surface evidence of the monument. What may yet survive, however, is the subsurface archaeology: the compressed fills of the fosse, the ghostly footprint of the bank's foundation, perhaps the remains of structures or pits within the interior, all potentially intact beneath the ploughed soil.