What once stood here was a fulacht fia, a type of prehistoric cooking or processing site found in enormous numbers across Ireland, typically identified by a characteristic horseshoe-shaped mound of fire-cracked stone and charred earth. They work on a simple principle: stones are heated in a fire and dropped into a water-filled trough until the water boils, and the discarded, shattered stones accumulate into the mound over repeated use. The example at Lismakeery has been levelled entirely, but the ground still holds evidence of what happened here.

The site was recorded on the 1923 Ordnance Survey six-inch map as a circular mound roughly ten metres in diameter, sitting on the western bank of a stream. That mound no longer survives above ground, but a band of burnt material remains along the stream edge, running 8.5 metres in length, 0.9 metres wide, and standing just 0.32 metres high. It is a thin, compressed trace of what was once a more substantial feature. The record was compiled by Denis Power and uploaded to the monument database in August 2011, placing it formally within the county's archaeological inventory even in its diminished state.

The site sits in pasture that is described as low-lying and marshy, which is entirely typical for fulachtaí fia; proximity to water was essential to their function, and poorly drained ground often helped preserve the organic and burnt material within the mound over millennia. Because the mound itself has been levelled, there is no dramatic field monument to observe, and the burnt band along the stream bank would be easy to overlook without prior knowledge of its location. Visitors with a serious interest in finding it should consult the National Monuments Service record and cross-reference with the 1923 OS map sheet, which still shows the original mound's position. The surrounding marshy ground means the site is best approached in drier months, and wellington boots remain sensible regardless of the season.