It is, in other words, an archaeological site that exists almost entirely as an absence, known only because someone once recorded it and gave it a number.

The site is a fulacht fia, a type of monument found in enormous numbers across Ireland and dating predominantly to the Bronze Age. The term refers to a horseshoe-shaped mound, usually found near water, formed from the accumulated debris of repeated heating: stones were fired in a hearth, then dropped into a water-filled trough to bring it to the boil, and the cracked, heat-shattered stones were raked aside after each use, building up over time into the characteristic mound. What exactly these sites were used for remains debated, with cooking, brewing, and textile processing among the more plausible theories. At Ballyclogh, a survey by Lehane in 1988 recorded the feature as a mound of burnt material, but the land has since been reclaimed for pasture and no surface trace now remains. What makes this site particularly striking is the density of similar monuments in its immediate surroundings: it sits within a cluster of ten fulachta fiadh, with a second example located immediately to its west. This kind of grouping suggests sustained, repeated activity in the area over a long period, rather than a single isolated episode of use.