These are lime kilns, the kind of workhorse structures that once defined agricultural Ireland, and they survive here in remarkably good condition. A lime kiln, for those unfamiliar, is essentially a furnace in which limestone is heated to extreme temperatures, breaking it down into quicklime, which was then spread across fields to reduce soil acidity and improve crop yields. They were once as common as farm gates, but well-preserved examples of this scale are considerably rarer.

The Ordnance Survey six-inch map of 1837 records a small quarry on this site alongside the two kilns, which suggests the raw material, the limestone itself, was extracted nearby before being burned on the spot. The eastern kiln is the older of the two, dating from the eighteenth century, while the kiln to the west appears to have been added sometime in the late eighteenth or early nineteenth century, suggesting the operation expanded as demand grew. That the kilns were constructed directly into the north face of a rock outcrop is both practical and characteristic of the period; the natural geology did some of the structural work, and the elevated position made loading the kiln from above far easier.

The site sits in close proximity to Naul Castle and Naul Church, which gives any visit a slightly layered quality, with different periods of the village's history compressed into a short stretch of ground. The kilns themselves are the sort of thing you could walk past without a second glance, but seen in context, set into living rock and recorded on maps nearly two centuries old, they carry a particular quiet weight. No special access is required, though as with many such industrial remnants, the surroundings can be uneven underfoot, so sensible footwear is worth considering.