Walk through this large arable field in County Dublin and you will find ploughed earth, open sky, and the quiet boundaries of three townlands converging nearby. But look at the same field from above, and something else entirely begins to emerge: a set of ghostly outlines pressed into the crop, the faint signatures of structures that have not been visible to anyone standing on the surface for a very long time.

What the aerial record reveals here is what archaeologists call a palimpsest, a landscape in which multiple phases of activity have been layered on top of one another over centuries, each leaving traces just below the plough-line. Cropmarks of this kind appear when buried features, such as the filled-in ditches of old enclosures or the compacted soil of former walls, cause the crops growing above them to ripen at slightly different rates, producing colour and texture differences that only become readable from altitude. At Killougher, drone images taken by Ian Lennon and Google Earth orthoimagery captured in July 2021 show a circular cropmark roughly 35 metres in diameter at the centre of the field. That circle is itself interrupted to the north by the outline of a sub-circular area, suggesting the two may once have formed conjoined enclosures. A separate rectangular earthwork lies approximately 140 metres to the north-north-west. The record was compiled by Caimin O'Brien and uploaded to the national monuments database in July 2023, drawing on Lennon's aerial survey work.

The field sits with its northern boundary running along the townland boundary with Hazardstown, while a stream to the west marks the line with Kitchenstown, a useful orientation if you are trying to locate it on a map. Because the features exist entirely below the surface, there is nothing physically to visit or examine at ground level; the site is of interest primarily to those following the aerial and cartographic record rather than those looking for something to walk around. The best way to engage with it is through the drone imagery and Google Earth orthoimages cited in the record, which bring the buried geometry into focus far more clearly than any approach on foot could manage.