On the south-east to north-north-west arc, a substantial earthen bank survives, accompanied by a wide, shallow fosse, the ditch that would originally have ringed the entire enclosure. On the opposite side, from the north-east around to the south-east, that same bank has been levelled, worn down or deliberately cleared away over centuries of agricultural use. The original entrance has been lost entirely.

This is a rath, the most common monument type in the Irish countryside, of which tens of thousands once existed. A rath is a circular enclosure defined by one or more earthen banks and ditches, used during the early medieval period, roughly between the fifth and twelfth centuries, as a farmstead and residence for a family of some local standing. The interior at Annagharnet measures approximately thirty-five metres in diameter, a typical size for a single-family enclosure of this kind. What makes this one quietly instructive is precisely its condition: the asymmetry between the surviving and levelled sections is a readable record of the pressures that have reduced so many similar sites across Ireland to near-invisibility, or removed them altogether. Here, at least, enough remains to trace the shape of what was once a complete and deliberate boundary.