A fulacht fia, sometimes spelled fulacht fiadh, is a type of ancient outdoor cooking place found widely across Ireland, typically consisting of a mound of fire-cracked stone and charcoal surrounding a water-filled trough into which heated stones were dropped to bring the water to a boil. What makes the Gortnalahagh example quietly remarkable is not just its age but its arrangement: beneath a spread of burnt material measuring 27 metres by 17.3 metres, excavators uncovered five separate troughs, three of which were conjoined, suggesting a degree of organisation or repeated use that goes beyond the simplest domestic cooking episode.

The site came to light not through any planned heritage survey but as a consequence of road building. In 2006, archaeologist Tracy Collins identified the site during test trenching carried out under Ministerial Direction Order A026/170 ahead of construction of the Southern Limerick Ring-Road. Once identified, it was excavated the same year by Aidan Harte as part of a broader investigation recorded as Gortnalahagh Site 2. Radiocarbon dating subsequently confirmed an Early to Middle Bronze Age date, placing activity at the site somewhere in the broad period from roughly 2500 to 1500 BC. The results were published by Harte in 2011. Prior to its discovery, the site had left no trace on the historical mapping record, which is not unusual for fulachtaí fia; thousands have been found across Ireland, many of them turning up only when ground is broken for development.

The site is not publicly accessible as a visitor destination and sits within agricultural land associated with the ring-road corridor south of Limerick city. There is no monument marker or interpretive signage on the ground. For those interested in the archaeology, Harte's published report remains the primary resource, and the site reference, NRA Reg. E2323, can be used to locate associated documentation through the National Monuments Service. The cluster of conjoined troughs is the detail worth dwelling on when reading the report; it raises questions about how the site was used over time that the evidence alone cannot fully resolve.