The grass gives it away. Where the bank and ditch of an early medieval enclosure once stood, the soil chemistry has shifted just enough that the grass grows differently, darker in a curving band that traces what was once the outer edge of a settled, defended farmstead. It is the kind of thing you could walk past without a second glance, and yet once you know what you are looking at, it becomes oddly compelling.

A ringfort, sometimes called a rath, is the most common monument type in the Irish landscape. These circular enclosures, typically defined by an earthen bank and an outer ditch known as a fosse, were the farmsteads of early medieval Ireland, occupied roughly between the fifth and twelfth centuries. The Kilcolman East example was recorded on the Ordnance Survey six-inch map of 1923 as a circular embanked enclosure of approximately 25 metres in diameter. By the time Denis Power compiled the site record, uploaded in August 2011, the monument had been levelled, most likely through decades of agricultural activity. What remains is a roughly circular area measuring 29 metres north to south and 27 metres east to west, slightly larger than the mapped enclosure, with a darker band of grass about three metres wide running west to east. That band is thought to indicate the arc of the infilled fosse, where organic material settled into the old ditch and enriched the soil above it.

The site sits on a very gentle north-facing slope and is in pasture, so access depends entirely on landowner permission. There is nothing to see in the conventional sense, no upstanding earthworks, no signage, no visible structure. The best chance of spotting the differential grass growth is during a dry spell in late spring or summer, when contrasts in soil moisture and fertility show most clearly from ground level or, ideally, from a slight elevation. What you are looking for is a subtle darkening in the sward, curving across the field in a broad arc, the faint outline of a house and yard that was already old when the Normans arrived in Ireland.