It measures roughly 18 metres east to west and 9 metres north to south, rising only about 40 centimetres from the surrounding ground, and it is composed almost entirely of heat-shattered stones and charcoal-enriched soil. That combination is the hallmark of a burnt mound, a type of prehistoric site found widely across Ireland and Britain. The prevailing interpretation is that these were cooking sites, where stones were repeatedly heated in a fire and then plunged into a water-filled trough to bring it to the boil; the cracked, fire-spent stones were then discarded into the characteristic heap that survives today. Some researchers have proposed alternative uses, including sweat houses or industrial processing, but the cooking explanation remains the most widely accepted.

What makes the Bawnard example quietly melancholy is the condition of its immediate landscape. A spring well that was recorded on the Ordnance Survey six-inch map of 1934, situated just on the north side of the field boundary that the mound adjoins, appears to have been drained away in the intervening decades. This matters because burnt mounds are almost always found beside a reliable water source, the spring or stream being as essential to their function as the stones and the fire. With the well gone, the original logic of the site is visible only by inference. The ground to the east, south, and west of the mound becomes waterlogged in winter, a reminder of how wet this hilltop once was, and rubble is gradually being spread across the area, slowly obscuring what remains.