This is a fulacht fia, a type of site found in enormous numbers across Ireland, and one of the more persistently puzzling features of the Bronze Age landscape. The basic form is always much the same: a horseshoe or kidney-shaped mound of burnt stone and charcoal, typically surrounding a trough that would once have been lined with timber or stone. The leading theory holds that these were cooking sites, where water was heated by dropping fire-heated stones into the trough until it boiled. Other suggestions have included their use as saunas, dyeing facilities, or brewing vats, and the debate has never been entirely settled.

The mound at Tooreenglanahee measures roughly 12.4 metres north to south and 11 metres east to west, rising only about 0.6 metres above the surrounding ground. Its opening, around 3.2 metres wide, faces west. These proportions are fairly typical of the type, though the sheer accumulation of burnt material over repeated use gives even a modest mound a certain quiet weight. What makes this particular spot slightly more interesting is that it does not stand alone. A second fulacht fia lies approximately 120 metres to the west-southwest, suggesting that this corner of North Cork saw repeated, perhaps sustained activity during the period when such sites were in use. Paired or clustered fulachta fia are known elsewhere in Ireland, and their proximity to one another raises questions about whether they functioned simultaneously, served different purposes, or simply reflect a landscape that was well-suited to the work, likely because of nearby water.