Buried just beneath the fields of Lullymore in County Kildare lies a road that nobody has used for a very long time. Running nearly half a kilometre in length and wide enough for a cart, it sits between ten and thirty centimetres below the present field surface, packed with a thick layer of gravel and pebbles that reaches up to forty centimetres deep in places. What makes it quietly remarkable is its setting: peatland. Building anything durable through boggy ground requires both intention and effort, and whoever laid this trackway went to considerable trouble to do so.

The road belongs to a tradition of purpose-built routes across Ireland's wetlands, though unlike the famous wooden togher, a type of timber trackway laid across bog surfaces that survives in large numbers across the Irish midlands, this one was constructed entirely from stone and gravel. No wood was found at the site at all. That choice of material is itself a point of interest. Gravel causeways of this kind required a reliable source of aggregate, which would have needed to be brought in from outside the bog, and they were built to last under pressure rather than to float on the surface. The Lullymore area sits within the great raised bogs of the Bog of Allen, a landscape that was once far more extensive and that has been worked and drained over centuries. The road's exact date is not recorded, but its depth below the current field surface suggests considerable age, the land having gradually altered around it.