This one in Kilnahera, County Cork, can only be read from a distance, and even then only under the right conditions. Set into a north-facing pasture slope, a possible circular hut site of roughly 3.5 metres in diameter makes itself known not through any physical protrusion but through the grass itself, which in dry weather shows a faint circular band of differential colour and altered growth pattern, the kind of ghost mark left when buried or long-vanished structures subtly alter the soil beneath.

Circular hut sites of this kind are generally associated with early medieval or prehistoric settlement, the remains of single-roomed domestic structures whose walls, once of stone or earthen construction, have long since been absorbed back into the landscape. What persists is the imprint, a difference in drainage or soil chemistry that the vegetation above registers more honestly than the eye at ground level can. When inspectors visited Kilnahera, the site was entirely invisible from the ground. Its existence rests largely on local knowledge, passed on by people familiar enough with the land to have noticed what a dry summer occasionally reveals.