That is a considerable span, and the wall itself, where it survives, runs between two and five metres wide, with evidence of an inner and outer revetment of boulders, meaning the wall was faced on both sides with larger stones to hold a rubble core in place. What makes the site quietly arresting is not its scale alone, but the care apparent in its construction: two distinct entrances, one to the east and one to the south-southeast, each flanked by upright slabs. The eastern gap, about 2.25 metres wide, has additional external stones arranged to create a funnelled approach, channelling movement inward in a deliberate way. The southern entrance is narrower, just over a metre wide, and bordered by radial slabs set outward like spokes.

The purpose of enclosures of this type remains a matter of ongoing discussion among archaeologists. They may have served as communal gathering spaces, stock enclosures, or ceremonial sites, and some combine elements of all three. At Keadeen, a circular stone hut sits in the northern part of the interior, about 16 metres from the enclosing wall, its own walls also built with inner and outer boulder revetments. At the centre of the whole enclosure, beside a small stream that runs north to south through the site, a standing stone has been recorded. The pairing of a standing stone and a watercourse at the heart of an enclosed space is a combination found at other Irish prehistoric sites, suggesting that both elements carried some significance in how the place was understood and used, though exactly when or by whom remains uncertain.