It traces the outline of what was once the northern arc of a substantial round-topped mound, roughly 18 metres in diameter and standing about 1.7 metres high. That the wall survives at all feels almost accidental; the mound itself was destroyed during the 1930s, taking with it whatever else might have clarified its age, its builders, or the ceremonies once associated with it.

Before its demolition, some investigation was carried out, and what the mound gave up was sparse but telling. It was constructed in two distinct layers: a stone core at the base, with an upper layer of sandy soil built over it. In the upper strata, excavators found a human skull and a large white boulder. The discovery was reported by Gogan in the Irish Independent on 14 August 1933. Round mounds of this kind are generally associated with prehistoric burial practice, the deliberate accumulation of material over the dead, sometimes over many generations, and the combination of a human skull and a placed boulder suggests this was no accidental deposit. The white boulder in particular carries a resonance common to Irish prehistoric sites, where quartz and pale stone appear repeatedly in funerary contexts, seemingly chosen with intent.

The site today requires some patience to read. The curving stone wall north of Boroughfield road is the main visible feature, and it is easy to pass without recognising it for what it represents. There is no monument, no interpretive signage. Knowing in advance that the wall describes the former northern edge of the mound helps the eye make sense of what it is seeing. The surrounding area of Burrow, near Portrane on the Fingal coast, is flat and open, which may itself help in visualising the mound as it once stood, a low but deliberate rise in an otherwise level landscape.