Others leave no mark on the ground at all, surviving only as scorched earth and local memory. In a patch of rough grazing south of a stream at Kilgobnet in County Cork, one such invisible site sits unnoticed beneath ordinary farmland, its presence known not from any visible feature but from burnt material reportedly found there.

The site is a fulacht fia, a type of prehistoric cooking or processing site found in large numbers across Ireland, typically dating from the Bronze Age. The name, roughly translated as "cooking pit of the deer," refers to a method of heating water by dropping fire-cracked stones into a trough. Over repeated use, the shattered stones accumulated into a horseshoe-shaped mound, often stained dark by organic material. Thousands of these sites survive across the Irish countryside, frequently close to water sources, which explains the stream nearby at Kilgobnet. What makes this particular example quietly interesting is how little of it remains in any detectable form above ground. The burnt material noted by local informants is really all that anchors it to the archaeological record, a trace of repeated fire and water and broken stone that once constituted a working site, now folded entirely back into the landscape.