Roughly twenty metres north to south and fifteen metres east to west, the spread of burnt material underfoot is the trace of a fulacht fia, a type of prehistoric cooking site found in their thousands across Ireland. The typical fulacht fia consisted of a trough, often timber-lined or stone-lined, filled with water and heated by dropping fire-cracked stones into it. Those shattered, blackened stones were then piled to one side, and it is precisely that accumulation, a horseshoe-shaped mound of heat-fractured rock and charcoal-rich soil, that survives at sites like this one, quietly humped beneath the grass.

What makes the Dannanstown example particularly worth noting is its proximity to a cairn, a mound of stones usually associated with prehistoric burial, recorded separately nearby. The two monuments occupying the same ground, or nearly the same ground, hints at a landscape that was used, layered, and reused over long stretches of prehistoric time. Fulachtaí fia are generally dated to the Bronze Age, roughly 2000 to 500 BC, though some examples are earlier or later, and their exact purpose has been debated for decades. Cooking in bulk is the most widely accepted explanation, though brewing, hide-working, and bathing have all been proposed by archaeologists at various points. The site at Dannanstown was recorded as part of the Archaeological Inventory of County Cork, with the visible remains described as a grass-covered spread of burnt material sitting on or close to the cairn site.