The enclosure at Ahnagurra is roughly 35 metres in diameter, defined by a fosse, which is essentially a deliberately cut ditch intended to demarcate or defend a boundary, along with a scarp and an outer bank. What makes it quietly odd is the internal division: a linear bank running east to west splits the interior cleanly in half, a feature that does not sit neatly with the typical layout of a simple ringfort or livestock enclosure. Something about the organisation of the space suggests a more deliberate, possibly functional arrangement, though what that function was remains unrecorded.

The enclosure does not appear on the first edition Ordnance Survey six-inch map of 1840, which is itself a useful clue, or at least a useful caution. By the time the 25-inch edition was produced in 1897, surveyors had recorded it as a circular feature with its fosse running from the north-west around to the north and east, a scarp continuing from east around to the south-west, and an outer bank following a similar arc. Even then, the monument was already being encroached upon. A field boundary running north to south had truncated the western edge, and another, curving boundary intersected it at the north, suggesting that by the late nineteenth century the enclosure was being absorbed into the surrounding field system rather than preserved apart from it. The research for the current record was compiled by Martin Fitzpatrick and uploaded in October 2021.

The site sits immediately to the west of a conifer plantation and approximately 150 metres south of the townland boundary with Griston East, which gives a reasonable fix on its location even without a formal public access point. The surrounding ground is described as wet pasture, so waterproof footwear is sensible at most times of year, and the wetter winter and spring months would make the going particularly heavy. The monument is partially overgrown, and its fosse, rather than any upstanding wall or obvious mound, is the clearest feature to look for. The enclosure is visible on Google Earth orthoimages if you want to orient yourself before visiting, which is often the most practical first step with a site this subtle.