This is a lime kiln, a structure once as essential to Irish farming as any tool in the shed. Farmers burned limestone at high temperatures to produce quicklime, which was then spread on acidic soil to improve fertility, or mixed into mortar for building. What survives here is unusually substantial: a south-facing front elevation stretching over eight metres wide, with a pair of stone-arched recesses set into it, each large enough to stand inside.

The kiln appears on the 1842 Ordnance Survey six-inch map as a rectangular structure, already in place and presumably in regular use by the time the surveyors came through. Its design follows the standard double-draw arrangement, where fuel and limestone were loaded from a ramp at the rear, fed down into a funnel, and drawn out as burnt lime through the arched openings at the front. The west recess, the better preserved of the two, still shows the sloping slabs at its rear and a small stoking hole, just eighteen centimetres by twelve, through which a worker would have coaxed the fire. A low gabled structure was once built out in front of this recess, though it has since been removed. The east recess is more overgrown, but a curious detail survives in its floor: a depression cut into the bedrock, roughly a metre across and eighty centimetres deep, which holds water and may be a natural spring. By 1904, the same Ordnance Survey series recorded only the west side of the kiln, suggesting the eastern portion had already begun its retreat into the landscape. The loading ramp at the rear, once eleven metres long, has also been removed, and the funnel area above is now inaccessible beneath vegetation.