It was not preserved by any formal act of protection; it was simply swallowed, slowly, and has only come back into view where someone cut into the ground for fuel.

The wall itself is modest in every measurable sense. Running roughly northeast to southwest for about 21 metres, it is built from intermittent uprights, boulders, and slabs placed on edge rather than laid flat, and it stands on average no more than half a metre high. A shorter section branches away at right angles toward the southeast. This L-shaped arrangement is characteristic of a field boundary, the kind of low-division wall that would once have parcelled out grazing land or marked a property edge before the bog advanced and rendered the landscape unworkable. That the construction technique relies on slabs set on edge rather than mortared or carefully coursed stonework suggests considerable age, though the peat itself is what has kept the structure from being robbed out or collapsed entirely. A. O'Sullivan and J. Sheehan documented this feature as part of their comprehensive archaeological survey of the Iveragh Peninsula, published by Cork University Press in 1996, which brought together the scattered field evidence from one of the most archaeologically dense regions in Ireland.

The Iveragh Peninsula, the broad finger of land in southwest Kerry that carries the Ring of Kerry road around its southern edge, holds an extraordinary density of early field systems, enclosures, and settlement remains, many of them similarly preserved beneath blanket bog. What makes the Cahernaman example quietly interesting is not its scale but its situation: a small peat-cutting has acted as an accidental excavation window, revealing a glimpse of an organised, pre-bog agricultural landscape on a hilltop plateau that most people passing through Kells would never think to look up at.