These features, typically identified by a horseshoe-shaped mound of fire-cracked stones and charcoal surrounding a trough, were once among the most visible archaeological landmarks in rural Ireland. At Ballyadeen, however, there is nothing to see at all.

The site first drew attention when the field was ploughed and a spread of burnt material came to the surface, the kind of dark, heat-shattered stone scatter that archaeologists recognise as the calling card of a fulacht fia. The working interpretation is that the mound, if one ever existed above ground, has since been buried or levelled by fence clearance, the process of removing old field boundaries and piling the debris nearby, which was common practice as agricultural land was consolidated in the nineteenth and twentieth centuries. What once may have been a low, legible mound of blackened stone is now indistinguishable from the surrounding pasture.