Somewhere beneath a heavily overgrown field on the edge of the River Barrow's former flood plain, an iron door once sealed the entrance to an underground chamber. That detail, recorded by Fitzgerald in 1897, is the kind of thing that tends to vanish from the landscape long before anyone thinks to go looking. The monument it belonged to was already disappearing by then, quarried for gravel until roughly two-thirds of its original bulk had been carted away. What Fitzgerald described was a substantial artificial mound or moat, some 38 feet high, with a triangular enclosure attached to its north-east side, the whole thing ringed by a deep broad dyke that gave it the overall character of a rath. A rath, or ringfort, is a type of enclosed farmstead built in earthwork, common across early medieval Ireland, though this particular site seems to have combined elements of both raised mound and enclosed compound in an unusual configuration.

By the time any formal record was made, the damage was already severe. Today, only the eastern half of the monument survives, a D-shaped area of roughly 22 metres in internal diameter, its south-western side now reduced to a straight truncated edge some 42 metres long. What remains is largely defined by a low inner earthen bank, a deep outer fosse dropping around six metres below the interior level, and a second low outer bank beyond that. A high scarp, still standing some eight metres, marks the abrupt south-western limit of the surviving portion. The whole thing sits at the eastern end of a low narrow ridge, surrounded by tillage farmland. The underground chamber, the iron door, the missing two-thirds of the mound; none of it is recoverable now, but the sheer depth of that outer fosse, still measurable in the ground, gives some sense of the scale of what was once here.