The mound measures some fifteen metres in diameter, modest in scale but typical of its kind. What makes the location quietly compelling is not the mound alone, but what sits beside it: another fulacht fia lies roughly 130 metres to the north-west, in the same field, suggesting this particular stretch of ground was returned to again and again.

A fulacht fia, sometimes translated as "cooking place of the deer", is a type of prehistoric site found in enormous numbers across Ireland, particularly from the Bronze Age onwards. The characteristic remains are the burnt mound itself, a spread of fire-cracked stone and charcoal-dark soil, and a nearby water source. The method, as archaeologists understand it, involved heating stones in a fire and dropping them into a water-filled trough to bring the liquid to a boil. The stones, stressed by repeated thermal shock, eventually shatter and are discarded, building up over time into the distinctive mound. At Carrigacunna, a small stream runs along a field fence approximately twenty-two metres to the east, almost certainly the water source that made the spot usable in the first place. The field remains wet even after recent drainage work, which is consistent with the boggy, well-watered ground that these sites so frequently occupy. The sandstone fragments in the mound bear the characteristic crazing and splitting caused by that cycle of heating and sudden cooling.