A ringfort, known in Irish as a rath, is a roughly circular enclosure built during the early medieval period, typically serving as a farmstead defended by one or more earthen banks and ditches. This particular example, recorded under the placename Ardlis, has been so thoroughly levelled by centuries of agricultural use that satellite imagery now does more to reveal its outline than a walk across the field itself. On recent aerial orthoimages, it appears as a circular cropmark, the buried earthworks beneath the pasture still subtly influencing what grows above them.

The site sits on a slight south-southeast facing slope with open views stretching east to southwest, and Newpark House lies roughly 100 metres to the southwest. The Ordnance Survey recorded it as early as 1840, marking it on their six-inch map under the name Ardlis and depicting it as a raised circular area defined by a scarp, though by then a post-1700 field boundary had already cut across the western and southwestern edges of the monument. By the time the twenty-five inch survey was completed in 1897, the feature was mapped as a raised oval shape, still defined by a scarp but with its original form already softened. A more detailed description compiled in 1999 recorded a raised sub-circular area measuring approximately 15.7 metres north to south and 14 metres east to west, with a surrounding fosse, that is a ditch, roughly three metres wide at the base and 0.6 metres deep on the exterior, and a causewayed entrance nearly four metres wide at the south-southeast, where a deliberate gap in the earthwork would once have allowed access.

The monument is in pasture, and given that the earthworks have been largely levelled, there is little to see at ground level without knowing exactly what to look for. The slight rise of the remaining scarp, standing only around 0.6 metres high, is the clearest surviving trace on the ground. Visiting in summer, when differential crop growth makes buried features more legible from any elevation, gives the best chance of reading the site visually. The surrounding landscape rewards attention in its own right, with the long eastward views that would have made this a sensible location for an early medieval farmstead still very much intact.