It is easy to overlook, half-obscured by overgrowth and grazed ground, but the geometry is still legible once you know what you are looking at: an earthen bank enclosing a space roughly 36 metres east to west and 34 metres north to south, with a fosse, a defensive ditch, running along the north-north-west to south-east arc outside it.

This is a rath, the earthen variety of ringfort, a class of enclosed farmstead built predominantly during the early medieval period in Ireland, roughly between the fifth and twelfth centuries. Thousands survive across the country in varying states of preservation, and this example in Faghcullia sits within that broad tradition. The bank itself is about six metres wide, standing only about twenty centimetres above the interior ground level but rising to just over a metre on its outer face, which is the more defensive profile typical of the form. There is a break of around three metres in the bank on the western side, likely the original entrance gap. A depression in the bank on the west-north-west may reflect later disturbance or an older structural feature. The interior is not flat; the ground rises gradually from the edges to a flattened plateau slightly south of centre, which in comparable sites sometimes indicates the former location of a dwelling or ancillary structure. The slope drops away steeply on the south-west to north-west arc, meaning the site would have commanded an open prospect across lower ground and towards the mountain beyond.