The grass grows evenly, the ground gives nothing away, and only from the air does the site resolve into something coherent: a roughly 45-metre-wide circle defined by two concentric ditches, with what appears to be an entrance cut into its south-western side. It is the kind of place that exists, fully and precisely, at an altitude of several hundred feet, and almost nowhere else.

The enclosure's paper trail is quietly interesting in its own right. When the first edition of the Ordnance Survey six-inch map was produced in 1839, the site was marked as an arc of trees, which suggests that whatever earthworks lay beneath had already been largely absorbed into the landscape, leaving only the vegetation pattern as a trace. By the time the revised edition appeared in 1899, even that had diminished: the arc was recorded as a ditch with some trees remaining. The fuller picture only emerged in 1970, when an aerial photograph catalogued as CUCAP BDI 23 captured the north-western quadrant of the enclosure clearly, with the two concentric ditches completing the circle across the rest of the site. Aerial photography has been essential to Irish archaeology precisely because so many earthworks survive only as soil and crop marks, visible from above but erased at ground level by centuries of farming. The ridge at Seskin, set between the Nore valley and a smaller stream valley in reclaimed grassland, offered exactly this kind of deceptive surface.