In a field at Ballynahinch in County Limerick, a barrow, which is a prehistoric burial mound, exists in the record not because anyone can see it from the ground, but because a gas pipeline survey once caught its outline from above. Today, standing in the same pasture, there is nothing to indicate that anything lies beneath the grass.

The site came to light during aerial photography commissioned by Bórd Gáis Éireann for the Curraleigh West-Limerick gas pipeline, when survey photographs taken on the 3rd of November 1984 revealed a circular cropmark or soilmark consistent with a buried monument. Cropmarks of this kind appear when buried features, whether a ditch, a mound, or a filled pit, cause vegetation above them to grow differently to the surrounding ground, a difference that becomes legible only at altitude. The barrow does not appear on Ordnance Survey Ireland historic maps, suggesting it was already levelled or obscured before the modern mapping era. By the time Digital Globe and Google Earth orthoimages were captured between 2011 and 2013, nothing was visible at all. The record was compiled by Fiona Rooney and uploaded to the national monuments database in June 2021. Roughly 260 metres to the west lies Cloheen Church and Graveyard, a separate recorded monument, which hints that this corner of Limerick carried some significance across several periods.

There is, practically speaking, nothing for a visitor to see at the spot itself. The site sits in private agricultural land and carries no marker, no signage, and no surface trace. Its value is archival rather than visual, a reminder that the archaeological record of any given field depends heavily on who looked, when, and from what height. The nearby Cloheen Church and Graveyard is the more accessible point of reference in the area, and anyone with an interest in how buried landscapes are detected might find more satisfaction in reading about aerial survey methods than in making the trip to the field itself.