It is not much to look at from a distance, barely 0.8 metres high, but the material that makes up this particular mound marks it out as something far older and stranger than a field boundary or a dumping ground. This is a fulacht fia, a type of prehistoric cooking site found in considerable numbers across Ireland, typically identified by the characteristic dark, crumbly spreads of fire-cracked stone and charcoal that accumulate from repeated use.

The standard interpretation of fulachtaí fia holds that they operated by heating stones in a fire, then dropping those stones into a water-filled trough to bring it to the boil. The shattered, heat-spent stones were discarded to the side, building up over time into the horseshoe mound that survives today. At Glenaglogh, the mound measures fourteen metres in length and eleven metres in width, a substantial accumulation that implies prolonged or repeated activity. The proximity of a natural spring would have provided the reliable water supply these sites required. What adds a particular note of interest here is that another fulacht fia lies immediately adjacent, suggesting that this corner of mid Cork saw sustained prehistoric use, possibly over generations, though the notes do not give dates or excavation findings that would allow closer dating.