It measures roughly 7.6 metres east to west and 6.5 metres north to south, rising to about 0.8 metres in height, with an opening of 3.4 metres facing north-west. What looks like an unremarkable rise in a field is in fact a fulacht fia, an ancient cooking site of a type found across Ireland in their thousands, typically dating to the Bronze Age. The characteristic form is no accident: the mound is composed of burnt and fire-cracked stone, the accumulated debris of repeated use, built up over time around a trough that would have been filled with water and heated by dropping in stones from a fire.

The proximity to the stream is entirely typical. Fulachtaí fia almost always appear near a reliable water source, which was essential to the cooking method. Whether this particular example was used for boiling meat, brewing, bathing, or some combination of purposes remains a matter of ongoing debate among archaeologists, though the evidence for cooking is the most consistent across excavated sites. In 1934, a researcher named Bowman recorded several fulachtaí fiadh within this townland, noting examples on land belonging to T. Dennehy, R. Dennehy, C. Daly, and a Miss O'Keeffe. The Rea-Allen site may be one of those four, though which specific parcel of land it corresponds to is not entirely clear from the available records. The cluster of sites in a single townland is not unusual; Bronze Age communities returned to productive landscapes repeatedly, and the density of such monuments in parts of Munster is particularly high.