On the southern slopes of Coomacarrea, a mountain on the Iveragh Peninsula, the peat has crept up around a series of ancient stone boundaries until they protrude only one to two metres above the bog surface, their lower courses entirely consumed. What makes the site quietly arresting is the completeness of the pattern still legible despite all that encroachment: the walls hold to a roughly grid-like arrangement, running north to south and east to west across an area of approximately 540 metres by 370 metres, their geometry suggesting deliberate agricultural organisation rather than casual clearance.

The walls themselves are built from block-like upright stones and boulders set on edge, averaging around 0.6 metres wide, which is a solid, workmanlike construction typical of field systems laid out for sustained use. Near the northern end of the complex sits a small circular hut with an internal diameter of no more than 2.2 metres, barely large enough for shelter or seasonal occupation. The presence of that hut alongside the field system points to a working landscape, probably associated with farming or transhumance, the seasonal movement of livestock to upland grazing that was once common across Ireland. The site drains toward tributaries of the Owroe river, which runs along the south-eastern edge of the complex, and it is the gradual accumulation of peat in this damp, low-lying ground that has both buried and, in a useful way, preserved what was built here. The archaeological survey of the Iveragh Peninsula, compiled by A. O'Sullivan and J. Sheehan and published by Cork University Press in 1996, brought formal attention to the complex and remains the principal record of its extent and character.