What remains visible, just about, is the southern face of a lime kiln, where a single arched recess breaks the stonework. That arch is the tell, the feature that separates this from an ordinary field wall or collapsed outbuilding.

Lime kilns were once a fixture of the Irish agricultural landscape. Farmers and landowners burned limestone at high temperatures to produce quicklime, which was then slaked with water and spread across acidic soils to improve fertility, or used as a binding agent in mortar for construction. The Kilcolman example follows the standard form: random-rubble walls enclosing an earthen core, with the arched opening at the front allowing fuel to be fed into the burning chamber below. The structure measures roughly six metres east to west and five metres north to south, compact dimensions that suggest a working kiln serving local rather than commercial needs. Beyond those dimensions and the visible southern elevation, the site offers little else to read; the rear is buried under growth and beyond reach.