It is a fulacht fia, a type of prehistoric cooking site found in enormous numbers across Ireland, typically consisting of a trough dug into the ground, a nearby water source, and a mound of the spent burnt stone that accumulated as rocks were heated and plunged into water to bring it to the boil. Thousands of these sites survive across the island, but their sheer frequency makes each one no less quietly odd: the cumulative labour of repeatedly heating, cracking, and discarding stone, repeated across centuries, leaving these modest dark humps in the landscape as the only record.

The mound at Gortavehy is horseshoe-shaped, measuring 11.2 metres north to south and 7.1 metres east to west, with an opening 3.1 metres wide facing west-south-west. That opening would originally have faced the working area of the site, where the trough and fire were managed. The spring beside it was not incidental; reliable water was a practical requirement, and waterlogged ground was typical of where these sites were established. What makes this particular location more interesting still is that it does not stand alone. Two further fulachta fiadh lie to the north, suggesting that this stretch of upland Cork saw repeated or sustained prehistoric use, whether for communal cooking, processing hides, or some other activity that archaeologists continue to debate.