Most of the structure lies hidden beneath the peat, yet the longest surviving stretch still runs for some 70 metres, with the walls averaging around 75 centimetres in height and protruding no more than 35 centimetres above the peat surface. That the walls are visible at all is, in a sense, the unusual thing. Peat accumulates over centuries, preserving what lies beneath it while quietly erasing it from view, and what remains exposed here is only a fraction of what the original boundary likely was.

The walls at Graignagreana form part of a broader complex, closely associated with a second site a short distance to the west: a circular hut with an internal diameter of just over four metres. Circular huts of this kind are a recurring feature of early medieval and prehistoric settlement across Ireland, typically built from dry-stone walling and used as domestic or agricultural shelters. This example survives in poor condition. Its northern side is entirely subsumed by peat, and where the walls do emerge they reach only about 15 centimetres above the surface. Together, the field boundary and the hut suggest a small working landscape, the kind of marginal upland farmstead that was once widespread across Kerry's interior but has largely been swallowed by the bog over time. The survey of the Iveragh Peninsula compiled by A. O'Sullivan and J. Sheehan, published by Cork University Press in 1996, recorded both features as part of a wider effort to document the archaeological complexity of this often-overlooked stretch of the southwest coast.