Look more carefully, though, and the slight rise of earth beneath it is something older: the surviving remnant of a circular enclosure that once stood roughly fifteen metres across on this south-south-east-facing hillside. The rest of the structure has been levelled, absorbed into the working landscape over generations, but that fence has unwittingly preserved the last visible trace of a bank that predates the modern field system by centuries.

The enclosure was recorded on the Ordnance Survey six-inch map of 1842, already drawn as a circular feature even then, which tells us that cartographers of the period recognised it as a discrete and legible form on the ground. Circular enclosures of this kind are among the most common archaeological monument types in Ireland, usually interpreted as the enclosed farmsteads of early medieval ringfort builders, though the term ringfort covers a broad range of sites. What makes Garryantaggart particularly interesting is the associated souterrain. A souterrain is an underground stone-lined passage or chamber, typically dug beneath or beside a ringfort, and used variously for storage, refuge, or both. The combination of enclosure and souterrain is well attested across Munster and points to a settlement that was, in its time, a purposeful and organised place rather than a casual one.