The one at Ahadagh in County Limerick does not. It presents three concentric earthen banks, a pair of fosses (the ditches dug to create the banks), and a sub-rectangular annex attached to its northern side, making it a considerably more complex arrangement than most of its counterparts across the Irish countryside. What draws the eye further is a detail in the layout: the inner and middle banks both have openings on the west and east sides, but there are no causeways crossing the ditches at either point. Gaps that appear to invite passage, but lead nowhere in particular.

The site was recorded and compiled by Denis Power, with notes uploaded in August 2011. The main circular enclosure measures 35 metres in diameter. The inner bank stands to an external height of 2.65 metres, which is a respectable profile for an earthwork of this kind, while the middle bank reaches 1.75 metres on its interior face. A third outer bank survives along the south-east to south-west arc, and from the eastern opening of the middle bank a linear bank and accompanying fosse extend outward for 20 metres before being cut short by a modern field boundary. The annex on the north-western side is a sub-rectangular area roughly 22 metres east to west and 16.8 metres north to south, itself enclosed by two concentric banks with a fosse between them. On its south-east side, the annex shares the ringfort's outer fosse rather than having its own. The junction between the two enclosures on the west is covered by a dump of rubble. A separate rectangular enclosure lies approximately 40 metres to the south-west.

The site sits in level pasture, and both the ringfort interior and the annex are described as partly under grass and partly covered by overgrowth, so the banks and their relationships are best read by walking the perimeter rather than trying to take in the whole from any single vantage point. The earthworks are low in places, particularly in the annex, but the outer fosse of the main enclosure, nearly a metre deep and three metres wide, gives a clearer sense of the original investment of labour this place represents. The missing causeways at the openings remain an open question, one of those small structural puzzles that archaeological records note but rarely resolve.