No mound breaks the surface, no earthwork catches the eye. Yet below the humus and the accumulated soil sits one half of what excavators described as a "double site", two oval mounds so close together, with only a shallow space between them, that they functioned almost as a single monument. This is a fulacht fia, a type of prehistoric cooking or processing site found widely across Ireland, typically recognised by the horseshoe-shaped mound of fire-cracked stones, ash, and charcoal that accumulates beside a trough used for boiling water. Here, that mound is simply invisible.

The site was partially excavated by Prendergast in 1955, along with its immediate neighbour. When she cut through the mound, she found an oval heap of burnt stones, ash, and charcoal more than half a metre deep at its centre, sitting directly on a layer of natural marl. Beneath the burnt material she identified what appeared to be two pits cut into the marl itself. One was fully excavated and measured nearly two metres by one and a quarter metres, half a metre deep, with a smoothly dished bottom, and it was packed solid with the same burnt debris from top to base. Prendergast also recorded at least five other fulachta fia within roughly a hundred metres of this spot, suggesting the area was returned to repeatedly over time, perhaps because the low-lying ground near the river offered a reliable water source essential to how these sites were used.