It is, in fact, a fulacht fia, a type of prehistoric cooking site found widely across Ireland and Britain, typically dating to the Bronze Age. The usual interpretation is that stones were heated in a fire and then dropped into a water-filled trough to bring it to the boil, with the cracked and spent stone accumulating over time into the characteristic mound that survives today.

This particular example is D-shaped, a geometry that is not uncommon among fulachta fiadh but is still notable. The straight side runs roughly north to south at 15 metres, while the curved half-circle extends up to 14 metres east to west, giving the site a substantial footprint for what is essentially an ancient outdoor kitchen. The mound itself rises to a maximum height of 0.8 metres. Its position in a low-lying field, only about 20 metres from a canal, fits the pattern seen at fulachta fiadh across the country; proximity to a reliable water source was essential to their function, and they are routinely found beside streams, rivers, and boggy ground.