At Roganstown in County Dublin, an irregularly shaped spread of burnt limestone and sandstone was uncovered during monitoring of groundworks, identified as a fulacht fiadh, one of the most common yet least understood monument types in the Irish archaeological record. These sites, which date broadly to the Bronze Age, are thought to have functioned as outdoor cooking places, where stones were heated in fire and then dropped into water-filled troughs to bring the liquid to a boil. The discarded, heat-shattered stones accumulated over repeated use into the low, horseshoe-shaped mounds that survive across the Irish landscape in their thousands.

The Roganstown example came to light through the work of archaeologist Dehaene, documented in 2004, and was compiled as part of the wider archaeological record by Geraldine Stout. The burnt spread itself measured 5.6 metres in length and 3.6 metres in width, composed of both limestone and sandstone fragments that had been subjected to repeated cycles of heating and cooling until they cracked and became useless for further cooking. No artefacts were recovered from the site, which is not unusual for fulachtaí fia; the monuments tend to yield very little in the way of objects, leaving archaeologists to interpret their function largely from their physical form, their frequent proximity to water sources, and occasional experimental archaeology. The absence of finds here means the site cannot be dated any more precisely than the general Bronze Age bracket that applies to most examples of the type.

Because the feature was identified during development groundworks rather than as a visible upstanding monument, there is little for a visitor to observe at the location today. The burnt spread would have been recorded and the groundworks continued. Roganstown sits in north County Dublin, and like many sites of this kind, the fulacht fiadh here exists now primarily as an entry in the archaeological record rather than a place one can walk to and read in the landscape. For those interested in the broader phenomenon, the National Monuments Service's Sites and Monuments Record holds details of the many hundreds of comparable features across the country, and low-lying, marshy ground in almost any Irish county remains the classic setting in which these sites were originally established and where they are most often encountered during modern groundworks.