It is, in fact, the remains of a fulacht fia, a type of prehistoric cooking site found in considerable numbers across Ireland, typically dating from the Bronze Age. The horseshoe shape is the giveaway: that characteristic curve, open on one side, is the signature form of a monument that was built up over repeated use as a communal place for heating water, likely by dropping fire-cracked stones into a trough until the water boiled.

This particular example measures thirteen metres in length and fourteen metres in width, rising to about a metre in height, with an opening of roughly two and a half metres facing northwest. The mound itself is composed of burnt and fire-shattered stone, the accumulated debris of those repeated heatings, which over centuries compacted and grassed over into the low ridge visible today. It sits close to the marshy ground to its north, which is consistent with the general pattern for fulachtaí fia: proximity to a reliable water source was essential to their function. The mound has suffered some erosion from animal activity, which is common for earthworks in active farmland, where livestock gradually disturb the edges and surface of exposed monuments.