A fulacht fia is, in essence, a prehistoric cooking site: a trough dug into the earth, usually near water, where stones were heated in a fire and then dropped into the water to bring it to the boil. The burnt and shattered stones, discarded after use, built up into the low, horseshoe-shaped mounds that survive in their thousands across Ireland, often in exactly the kind of wet, marginal ground found here.

What makes Knockaphreaghane quietly notable is not one such site but two. A second fulacht fia lies immediately to the south, the pair sitting close together in the marshy ground on the eastern bank of the stream. The proximity of the two monuments raises the kind of questions that prehistoric archaeology tends to leave unanswered. Whether they were in use at the same time, whether they served the same community or different ones, and why this particular stretch of streamside ground was chosen more than once, are things the burnt spreads alone cannot tell us. The site is recorded in the Archaeological Inventory of County Cork, which documented monuments across the county through the 1990s, and the presence of two examples so close together at this location was noted as a feature worth distinguishing in the record.