Nothing about it announces itself. But when a drainage channel cut through its eastern edge, the exposed section revealed burnt material running down to a depth of 1.6 metres, a detail that reframes the mound entirely.

What you are looking at is a fulacht fia, a type of prehistoric cooking site found in enormous numbers across Ireland, with Cork being particularly well represented. The name is an old Irish term loosely meaning "cooking place of the deer", though the structures were almost certainly used for a wider range of purposes. The typical arrangement involved a trough, often timber-lined or stone-built, filled with water from a nearby source, into which fire-heated stones were dropped to bring the water to a boil. Those stones, cracked and darkened by repeated heating and sudden cooling, were then discarded to the side, gradually building up the characteristic horseshoe-shaped mound of scorched and shattered rock that survives at sites like this one. The spring recorded to the west of the Knockane mound fits this pattern precisely; a reliable water source was essentially a prerequisite, and these sites cluster around streams, springs, and boggy ground with a consistency that borders on the mechanical. The depth of burnt material here, nearly the height of a person, points to sustained and repeated use over a long period.