The site at Coldwinters is a fulacht fia, a term used to describe a type of ancient cooking place typically consisting of a trough, a nearby hearth, and a mound of shattered, fire-cracked stones. The process involved heating stones in a fire and dropping them into a water-filled pit until the water boiled, after which food could be cooked. What was found here is modest in scale but quietly eloquent about the lives of the people who used it.

The site came to light not through targeted archaeological survey but during pre-development work on the Northern Motorway, the kind of ground-disturbance that has, over the decades, turned up a significant proportion of Ireland's known prehistoric sites. The pit itself measured 1.96 metres long, 1.4 metres wide, and 0.57 metres deep, and was filled with burnt mound material, the characteristic dark, charcoal-flecked deposit of fragmented heat-shattered stone that accumulates around these sites over repeated use. More intriguing still were the forty-three stake-holes recorded at the site, arranged in two parallel lines. As noted by Campbell in 2003, these suggest the presence of a fence-line or some form of light structure associated with the use of the pit, a detail that hints at a degree of organisation around what might otherwise seem a purely functional spot. The site was compiled for the record by Geraldine Stout and uploaded in August 2011.

The site is not publicly accessible in any formal sense and sits within a landscape that has been substantially altered by motorway construction. For those interested in fulachtaí fia more broadly, the National Roads Authority's excavation reports from the motorway programme contain some of the most detailed recent work on these sites, and several examples from the same corridor have been documented in comparable detail. If the Coldwinters site prompts curiosity about what such a place would have looked like in use, the wetland margins and ridge-and-hollow topography of north County Dublin still preserve something of the general character of the terrain these communities moved through.