It measures approximately 60 metres across, which is a substantial size, yet its interior was so uneven and overgrown that it was entirely inaccessible during a site inspection in 1999. The structure is defined by a loose drystone wall of leaning slabs, most legible along its south-eastern arc, giving the impression of something that has been quietly subsiding and tilting for a very long time.

The enclosure appears on the Ordnance Survey 25-inch plan of 1897 and again on the Cassini edition of the 6-inch map published in 1920, which suggests it was notable enough to record even then, though what it actually is remains uncertain. When the Record of Monuments and Places was compiled in 1996, the site was listed with the cautious designation "Cashel (possible)". A cashel is a type of early medieval stone-walled enclosure, essentially an Irish equivalent of a ringfort but built from stone rather than earthen banks, typically used as a defended farmstead or settlement. The qualifier "possible" does the real work here: the wall's irregular subcircular plan and the difficulty of accessing the interior have made confident identification elusive. Gibson, writing in 2007, took up the question at some length without resolving it, which is itself a kind of answer about how much the site still withholds.