That is, in a sense, the whole point. Somewhere beneath the pasture, beside a spring, lies the flattened remnant of a fulacht fia, a type of prehistoric cooking or processing site found in great numbers across Ireland, typically identified by a horseshoe-shaped mound of burnt and fire-cracked stone left behind after repeated use. This one was levelled during field fence clearance, leaving no visible surface trace. The land has closed over it entirely.

Fulachtaí fia, the plural form, are among the most common archaeological monument types in Ireland, often dating to the Bronze Age, roughly 2000 to 500 BC. They tend to cluster near water sources, which makes the location beside a spring entirely typical. The working theory is that stones were heated in a fire and then dropped into a water-filled trough to bring it to a boil, whether for cooking, bathing, or some industrial process such as textile preparation. What makes the Mullenroe site quietly notable is its company: a second fulacht fia lies approximately 100 metres to the south-west. Paired or clustered examples are not unheard of, and their proximity here suggests this particular corner of Mid Cork saw repeated, perhaps sustained, prehistoric activity around the same water source.