At roughly fifteen metres long and twelve metres wide, but only a quarter of a metre high, it is barely a ripple in the landscape, and yet its shape and contents mark it out as a fulacht fia, one of the most numerous and least-explained monument types in the Irish archaeological record. These sites, found in their thousands across Ireland, are generally interpreted as Bronze Age cooking places, where stones were heated in fire and then dropped into a water-filled trough to bring the contents to a boil. The distinctive crescent or horseshoe shape of the surviving mound is the accumulated debris of those fractured, fire-cracked stones, discarded after each use.

The site at Dromdaleague has the characteristic central depression, here measuring nearly five metres across, which represents the position of the original trough, whether timber-lined, stone-built, or simply cut into the earth. A stream runs to the north, providing the reliable water source that these sites almost invariably require. The ground remains boggy, which is both typical of the landscape preference shown by fulachtaí fia and part of the reason so many have survived at all, preserved beneath peat and waterlogged soil that slows decay and resists development. The burnt mound material itself, a mix of charcoal, ash, and shattered stone, gives these features their dark, spongy texture and their distinctive appearance when sectioned during excavation.