At Knocklagh in County Cork, one such site sits quietly in rough grazing land, presenting itself as little more than a low, roughly circular mound of burnt material, measuring around six metres across and barely thirty centimetres high. It is easy to dismiss as a natural feature of the ground, which is precisely what makes it interesting.

A fulacht fia, sometimes translated loosely as "cooking place of the deer," is a Bronze Age monument formed from the accumulated debris of a simple but effective heating method. Stones were placed in a fire, then dropped into a water-filled trough to bring the water rapidly to boiling point. The repeated heating and sudden cooling caused the stones to crack and shatter, and the resulting mound of fire-reddened, fragmented stone is what survives today, sometimes for three thousand years or more. What makes the Knocklagh site quietly compelling is that it does not stand alone. A second fulacht fia lies approximately fifteen metres to the south, suggesting that this particular patch of North Cork was a place of repeated, deliberate use rather than a one-off episode. Whether the two monuments were used simultaneously or represent activity separated by generations is something the ground does not readily give up.