It is not especially large, measuring about 21 metres north to south and 23 metres east to west, but its preservation is good enough that you can still read the landscape logic behind it. The enclosing bank, built of earth and stone, stands nearly two metres high on the interior and runs four metres wide from north-north-east around to south-west, where the ground itself drops away in a natural scarp of similar height. Higher ground to the south and east closes off the view in those directions, but to the north and west the site opens out across lower terrain toward the bay.

Ringforts are the most common field monument in Ireland, typically dating from the early medieval period, roughly the fifth to the twelfth centuries, and generally understood as the enclosed farmsteads of farming families rather than military fortifications in any conventional sense. The bank here would have marked a boundary, kept livestock in, and signalled ownership or status. What makes Faunarooska worth pausing over is partly its setting and partly its context within the surrounding landscape. The ringfort sits at the south-western edge of a multiperiod field system covering an area of approximately eight square kilometres, a layered agricultural landscape in which boundaries, enclosures, and field walls from different periods accumulated over centuries. The ringfort was not mapped when the Ordnance Survey produced its six-inch sheets in 1842, but by the 1915 edition it appears, indicated by hachures, the cartographic convention for showing earthwork relief. Whether it was simply overlooked earlier or became more legible as surrounding vegetation changed is not recorded.