These sites, found in their thousands across Ireland, typically consist of a mound of fire-cracked stone accumulated beside a trough, where water was heated by dropping in stones that had been brought to high temperature in a nearby hearth. What they were actually used for, whether cooking, brewing, bathing, or industrial processing, has been debated for decades without a settled answer, which lends even the most modest example a quiet air of unresolved mystery.

The Lisfehill site survives as little more than a scatter of burnt stone disturbed by agricultural activity, the kind of low-visibility remain that ploughing gradually erodes and redistributes across a field. Cork is particularly dense with such sites, and the East and South Cork inventory from 1994 recorded this one among many. The burnt, shattered stone, typically sandstone or similar rock that fractures dramatically under thermal stress, is often the only trace left when the organic elements of a fulacht fia, timber troughs, charcoal, worked wood, have long since disappeared into the soil.