In places the walls are clearly visible where the bog has been cut away; elsewhere only the tops of the stones break the surface, like the spines of something long buried. The overall network stretches roughly 280 metres from north-west to south-east and about 120 metres across, making it a substantial remnant of a farming landscape that was, at some point, simply abandoned to the encroaching peat.

These are relict field boundaries, the term used for walls or enclosures that predate the bog growth around them and survive in fossilised form beneath or within it. Blanket bog, which forms in cool, wet climates where waterlogged conditions prevent the normal decomposition of plant material, can preserve stone structures for centuries or even millennia beneath its accumulated layers of peat. The main wall here runs roughly north-west to south-east for around 280 metres, reaching a maximum height of about 0.8 metres and a thickness of around 0.55 metres, with shorter branching sections extending to the south-west and north-east. What is particularly striking is the geometry: most of the walls curve rather than run straight, suggesting a way of organising land that predates the more systematic rectilinear field patterns associated with later agricultural improvement. Whose fields these were, and when they were laid out, is not recorded, but their survival beneath the bog points to a time when this slope was actively farmed, the ground divided and managed by people who left almost nothing else behind.