It measures nearly fifteen metres along its longer axis and rises to about one and a half metres, with a four-metre opening facing northwest. That distinctive shape is the giveaway: this is a fulacht fia, a type of prehistoric cooking site found in great numbers across Ireland, typically consisting of a trough dug near a water source, heated stones used to boil the water, and the cracked, fire-shattered remnants of those stones piled up into the characteristic horseshoe form around the trough. The mound at Glennakeel is that accumulated debris, built up over repeated use, probably spanning centuries.

The site appears in the local record at least as far back as 1934, when a researcher named Bowman noted a fulacht fiadh on land belonging to a T. Murphy in the area. The detail connects this otherwise anonymous mound to a specific moment of documentation, and to the longer tradition of antiquarians working through the Cork landscape and cataloguing what they found before it was lost to agriculture or development. Fulachtaí fia are among the most common archaeological monument types in Ireland, numbering in the thousands, yet individual examples rarely attract much attention precisely because of that abundance. The one at Glennakeel, with its careful dimensions and its proximity to running water exactly where you would expect to find it, is quietly representative of a way of life that left its mark on the Irish countryside in burnt flint and blackened soil.