The wall, roughly 0.7 metres wide and built from crudely arranged boulders, traces an oval only 6.3 metres north to south and 5.4 metres east to west. Several of the boulders are set on edge, and most are radially disposed, meaning they are oriented outward from the centre like spokes, which lends the structure a deliberate, if modest, geometry. What makes it quietly puzzling is the absence of any discernible entrance.

That missing doorway is the detail that shifts the structure away from the more familiar categories of early Irish enclosure. One possibility put forward in the archaeological literature is that this is a fionnán enclosure, a type of feature thought to be associated with the management or storage of coarse grass, specifically fionnán, a wiry upland grass once used as fodder or bedding. If that identification is correct, the sealed perimeter would make functional sense; the enclosure was never meant to be entered in the way a habitation or a cashel, a stone-walled ringfort, would be. The site appears on the second edition of the Ordnance Survey map as a very small circular feature, which suggests it was still recognisable in the landscape when Victorian-era surveyors passed through the Iveragh Peninsula, the broad sweep of south Kerry coastline that includes some of the most densely layered archaeological terrain in the country.