The kiln is gone, removed around 1906 according to a 1937 source, but the U-shaped recess it left behind is still visible, a small biographical scar on a structure that had already been standing for well over a thousand years before anyone thought to quarry lime from its banks.

The ringfort at Dooneens sits in pasture on a natural rise above the narrow valley of the River Blackwater, with the ground falling away to the north-east and east. A rath, as this type of monument is generally known, is a roughly circular enclosure defined by an earthen bank, and in early medieval Ireland such enclosures served as farmsteads, the raised interior protecting a household and its animals. Here the bank survives to a height of 2.1 metres and encloses a roughly circular area measuring 38 metres north to south and 36 metres east to west, with an entrance gap of about 4 metres to the south-east. The interior is deliberately levelled on the north-east side to compensate for the natural slope of the hill, which gives a sense of the care that went into the original construction. At the centre, there is a possible souterrain, an underground passage or chamber of the kind that often served for storage or concealment, though its full extent remains uncertain.

The limekiln episode is a reminder of how these sites have been continuously used, adapted, and stripped across the centuries. Whoever built that kiln into the bank saw a convenient mass of stone and earth rather than an ancient boundary. The U-shaped hollow they left behind is now the most visually distinctive detail on the eastern side of the monument, an accidental record of agricultural life centuries after the rath itself had fallen out of use.