It was marked on an 1897 Ordnance Survey map as a "Cave," shown as a circular opening of roughly three metres across, sitting in the south-eastern corner of a ringfort. By the time satellite imagery began covering the area in the early 2010s, no surface trace remained. What was once visible enough to warrant annotation on a large-scale map has since been absorbed back into the field.

Souterrains are underground stone-lined passages or chambers, typically built during the early medieval period in Ireland, often in association with ringforts. Their precise purpose is still debated, though cold storage, refuge, and concealment have all been proposed. The one at Moorestown sits within the ringfort known locally as Moorestown fort, a site recorded in the national monuments register. The 1840 edition of the Ordnance Survey six-inch map made no mention of the souterrain at all, suggesting it was either already obscured by that point or simply overlooked by the surveyors. It was the revised 1897 twenty-five-inch edition that caught it, marking the circular opening in the south-east quadrant. The antiquarian Thomas Johnson Westropp, writing in 1916 and 1917, also noted the souterrain's presence inside the fort, which gives some independent confirmation that something was still at least partially visible or known about in the early twentieth century.

The site today lies in pasture, and nothing on the surface distinguishes this corner of the ringfort from the surrounding ground. The ringfort itself may offer more visible earthworks depending on the season and the height of the grass, as low winter light can pick out subtle earthen banks that vanish in summer. Anyone visiting should bear in mind that the land is agricultural and private. The souterrain's exact condition underground is not documented in the current record; whether the chamber survives intact beneath the soil, or has collapsed, is simply not known from the available sources.