Fragments of burnt stone push through the surface, the most visible sign of what this modest rise actually is: a fulacht fia, the remains of a prehistoric cooking site. The term refers to a type of monument found in extraordinary numbers across Ireland, typically consisting of a mound of fire-cracked stone accumulated beside a water source and a trough, where water was boiled by dropping heated stones into it. They date broadly to the Bronze Age, though some examples span other periods.

This particular example at Rathmore measures roughly six metres in both directions and rises no more than thirty centimetres at its highest point, making it an easy thing to overlook entirely. Its southwestern edge is poorly defined, blurring into the surrounding ground. What makes the location quietly interesting is what lies just six metres further to the southwest: another low, grass-covered mound, similarly indistinct, which may represent a second fulacht fia. Two such features so close together, both positioned near the margins of a river flood-plain where water would have been consistently accessible, suggests this stretch of ground saw repeated or sustained prehistoric use rather than a single isolated episode of activity.