This one sits on a gently north-eastward-facing slope at Mauganstown, surrounded by tillage on three sides and pasture to the north. What makes it quietly odd is the way human activity across the centuries has both preserved and eaten into the same structure.

Ringforts, sometimes called raths, were the enclosed farmsteads of Early Medieval Ireland, typically dating from roughly the fifth to the twelfth centuries. They consisted of one or more circular earthen banks, called raths, with accompanying ditches known as fosses, enclosing a domestic interior. This example at Mauganstown is bivallate, meaning it has two concentric banks rather than the more common single ring, which may suggest it belonged to someone of higher social standing or simply that the occupants wanted a more substantial barrier. The inner bank measures nearly nine metres wide and still stands about 2.2 metres high on its outer face. The outer bank, slightly narrower at 8.2 metres, rises to 1.7 metres. Both are earthen, with small boulders visible in places, and both are flat-topped rather than rounded, giving the monument a composed, deliberate look that centuries of weathering have not entirely erased. A fosse roughly four metres wide and over a metre deep runs between the two banks, and a slighter outer fosse is still traceable in the north-west quadrant. A gap of about 5.3 metres in the southern quadrant is thought to be the original entrance, though it has since been widened to permit access to a quarry that removed the inner bank and interior in that same sector. The northern outer bank has also suffered some quarrying, though vegetation now obscures how much. Trees have taken root on the banks, which is not unusual for sites that have drifted out of agricultural use, but the interior remains relatively clear.