The extent of the spread has never been fully determined, and the site itself has no dramatic monument to announce it. What it does have is company: two more of the same type lie close by, one directly adjacent and another roughly thirty metres to the east, making this a cluster of three.

These sites are fulachta fiadh, a term used for a type of prehistoric cooking or processing site found in extraordinary numbers across Ireland. The typical form involves a hearth, a trough dug into the ground and lined to hold water, and a mound of shattered, heat-fractured stone that builds up over repeated use as hot stones were plunged into the water trough to bring it to the boil. The cracked and blackened stone is usually the most visible trace that survives. Why three should occur so close together in Lisladeen is not recorded, but grouped fulachta fiadh are not unheard of, and their clustering may reflect repeated return to a particular spot over generations, or activity by a community making use of a convenient water source. The burnt material visible here is consistent with that long pattern of use, even if the full footprint of the site remains unmeasured.