It is a modest remnant, easy to overlook: a slight bank and fosse, which is a defensive ditch, enclosing a depression in the ground, with a further rectangular hollow cut into the side of a natural ridge to the west and a narrow two-metre-wide trackway leading away to the north. The site sits on a small natural ridge with open views in every direction, the kind of elevated position that would have made practical sense to earlier inhabitants even if nothing about the landscape today suggests a settlement of any consequence ever stood here.

The 1837 edition of the Ordnance Survey six-inch map annotates a cluster of buildings fifty metres to the north as Brownstown Old, which at least confirms that by the early nineteenth century the memory of an older, more substantial place was still attached to this ground. What came before those mapped structures is harder to say with certainty, and the earthworks themselves are interpreted cautiously as a complex series of depressions whose full extent and date remain unclear. The site does not stand in isolation. Sixty-five metres to the north-north-east lies a possible moated site, a form of enclosed farmstead or manor associated mainly with Anglo-Norman settlement in Ireland, typically consisting of a rectangular platform surrounded by a water-filled ditch. One hundred and ten metres to the east is a ringfort, the circular enclosure type that is ubiquitous across the Irish countryside and generally associated with early medieval farming settlement. The clustering of these three features on and around the same ridge suggests a landscape that was used, reused, and reorganised across a long span of time, even if the precise relationship between them is no longer legible on the surface.