The raised platform at its centre seems, at a glance, to sit naturally on the high ground, but the ground itself was not naturally this tidy. Whoever built here had to work against the land's own inclinations.

The site is a rath, the Irish term for a ringfort, the enclosed farmstead type that was built across Ireland from roughly the early medieval period onwards and is now one of the most common archaeological monument types in the country. This example measures twenty metres in diameter, enclosed by an earthen scarp rising to about 1.4 metres. Around the outside of that bank runs a fosse, the drainage and defensive ditch that typically accompanies such earthworks, here between 7.1 and 7.9 metres wide and varying in depth from 0.4 to 1.2 metres. What makes the construction particularly interesting is the engineering compromise built into it. The ridge slopes south-facing from east to west, and the rath sits across that slope in such a way that the south-eastern to south-western arc rides up onto the natural fall of the land. To counteract this, the interior was deliberately levelled up, creating a flat usable surface where the ground would otherwise have run away beneath it. The fosse follows the circuit from south-west to north-west and from north-east to south-east, but disappears elsewhere, presumably because the natural topography made it redundant or impractical on those sides. No original entrance survives in recognisable form.

The effect of all this careful adjustment is that the interior sits above natural ground level almost everywhere around its perimeter, except on the north-western side, where the platform and the surrounding land are flush. Standing there, the effort involved in making the site work on a gradient becomes oddly legible, a practical problem solved in earth and labour sometime in the early medieval centuries, still visible in the quiet geometry of the place.