It would be easy to walk past without a second thought. What it actually represents is the remnant of a fulacht fia, a type of prehistoric cooking site found in enormous numbers across Ireland, typically dating from the Bronze Age. The mound is composed of burnt and fire-cracked stone, the accumulated debris of repeated heating episodes in which stones were brought to a high temperature and dropped into a water-filled trough to bring it to the boil.

The mound at Knockaneroe measures roughly nine metres north to south and eleven metres east to west, but ploughing has spread the burnt material considerably beyond that core, with scorched debris detectable over a total distance of twenty-six metres north to south and seventeen metres east to west. That spread is itself informative. It suggests the site has been under cultivation at some point, gradually breaking apart what would originally have been a more compact deposit. Fulachtaí fia are among the most common field monuments in Ireland, yet the majority survive in exactly this condition, reduced and partially dispersed, their original shape only legible from what the plough has left behind.