What survives at Corratanty is a D-shaped enclosure, its flat side presumably once completed by whatever the road has since removed, sitting quietly on a drumlin ridge in County Monaghan.

The enclosure measures roughly 28.5 metres along its northwest to southeast axis and about 14.6 metres across, defined by a low earthen bank covered in grass and scrub, with some trees along its southern and western arc. The bank itself is modest, around 2.2 metres wide, rising only about 0.3 metres above the interior ground level and 0.9 metres above the exterior. There is no visible fosse, the term for the external ditch that typically accompanies an earthen bank of this kind, and no identifiable entrance gap survives. Earthwork enclosures of this general type are commonly referred to as ring forts, or raths, though the D-shape here suggests either an unusual original plan or, more likely, that the full circuit was adapted to take advantage of the natural elevation of the drumlin. Drumlins, the elongated oval hills that define so much of the Monaghan landscape, were formed by glacial action and offered early inhabitants naturally defensible and well-drained positions. Placing an enclosure towards the southeastern end of such a ridge would have given it a commanding view of the surrounding low ground while keeping construction effort to a minimum by using the slope itself as part of the defensive logic.