Measuring fourteen metres from north to south and cut along its upper edge by a drainage ditch, it registers barely as a rise in the pasture. Yet it is the physical residue of a fulacht fia, a type of prehistoric cooking site found in enormous numbers across Ireland, typically beside a water source. The usual interpretation is that water was drawn into a trough, stones were heated in a fire nearby, and the hot stones were dropped into the trough to bring the water to a boil. The burnt and shattered stones, discarded after repeated use, accumulated into the horseshoe-shaped or oval mounds that survive today.