A circular mound, roughly three and a half metres across and about a metre high, sits in the middle of what was once a defended enclosure. Earlier mapmakers noted a "cave" at this spot, which almost certainly points to a souterrain, an underground stone-lined passage or chamber of the kind commonly built beneath early medieval ringforts for storage or concealment. The mound itself may simply be the collapsed or overgrown roof of that structure, pushing up through centuries of accumulated earth.

The enclosure surrounding it is a univallate rath, meaning it had a single encircling bank and ditch, built to a diameter of about seventeen metres north to south. Raths of this kind were the farmsteads of early medieval Ireland, typically dating from roughly the fifth to the twelfth century, and they appear in their thousands across the country, though few survive in good condition. This one has fared poorly. It does not appear on the 1842 Ordnance Survey map at all, suggesting it was already considerably reduced by that point, and only the northern arc of the bank, running west and round to the south, remains legible in the landscape. Where it does survive, the bank is about four metres wide at the base and rises to one and a half metres above the surrounding ground. The eastern side has been lost entirely. What is notable, despite the levelling, is the position: the rath sits on elevated ground with an open view of the surrounding land, the kind of placement that would have made practical sense for a farming household keeping watch over its fields and livestock.

The site sits to the south-east of two other early features, St Dahalin's Church and Tobernasool holy well, a cluster of monuments that together suggest this corner of north Kerry was a focus of activity for a very long time. The dedication to St Dahalin, a figure otherwise little recorded, gives the townland its name, and the proximity of church, well, and rath within a small area is a pattern repeated across Ireland wherever early Christian settlement took root alongside older farming communities.