This one near Kerries, in County Kerry, survives as a strip of ground barely fifteen centimetres high. That faint swelling in the grass is what remains of a prehistoric enclosure, a roughly circular or oval boundary, probably once defined by a more substantial bank, that once organised the landscape here in ways we can only partially guess at. The fact that it exists at all as a visible feature is something of an accident.

The site was first spotted not by a fieldworker walking the ground but by someone examining aerial photography, the kind of oblique or vertical image that can reveal cropmarks, soil disturbances, and subtle changes in vegetation that betray buried or eroded features below. What the photographs showed was an enclosure in an area that had since undergone intensive agricultural improvement. Boundaries were removed, the land was ploughed, and the surface was reseeded as grassland. When researchers came to look for the site on the ground, almost nothing was left. The one surviving trace is a short arc of low, broad bank along the eastern side, measuring 3.4 metres wide and standing just 0.15 metres above the surrounding surface. Michael Connolly, who described the site as part of his 2008 doctoral thesis on the prehistoric settlement of the Lee Valley near Tralee, concluded that the site is effectively destroyed at ground level.

There is a particular kind of melancholy in a site like this. The aerial image captured something real, a pattern in the earth that spoke to human activity in prehistoric Kerry, but by the time anyone could respond, the ordinary pressures of farming had reduced it to a single low undulation. It sits in the landscape as a reminder that the archaeological record is not fixed; it erodes, is ploughed away, and disappears into reseeded pasture, leaving only the faintest crease in the ground to suggest that something once stood here.