They appear as low, horseshoe-shaped mounds, typically found near streams or marshy ground, and are thought to represent ancient cooking or industrial sites where stones were heated in fire and then dropped into water-filled troughs to bring the liquid to a boil. The one recorded at Abbeylands in County Kilkenny belongs to this broad and still debated tradition, a trace of activity from roughly 1500 to 500 BC embedded in a landscape that has long since moved on around it.

The placename Abbeylands points to a later layer of history, suggesting land once associated with a monastic or ecclesiastical holding, though the fulacht fia itself predates any such institution by well over a millennium. These sites are often found in clusters in the Irish midlands and south, and Kilkenny has its share. The sheer number of fulachtaí fia recorded across Ireland, estimated at over four thousand, has led archaeologists to question whether cooking alone explains them all; brewing, hide-working, and bathing have all been proposed as alternative or additional functions. What remains consistent is the signature signature of cracked and fire-reddened stone piled up beside the remnants of a trough, the stones discarded after each use because re-heating them risked shattering.