It belongs to that quietly unsettling category of Irish archaeology, the crop mark site, where buried features betray themselves through the differential growth of crops or grass. Where an old ditch was dug and later filled in, the soil retains more moisture; where a bank once stood, the ground is compacted and dry. From an aircraft or drone, these variations in colour and texture resolve into shapes, rings, lines, and boundaries that have not been seen at ground level for centuries, possibly millennia.

The enclosure at Merryfalls was identified through aerial photography and recorded in the Sites and Monuments Record for County Dublin under the reference DU014-107. The record, compiled by David O'Connor and uploaded in November 2013, draws on the SMR file and on a personal communication from T. Condit. Alongside the circular enclosure itself, further features visible in the aerial imagery suggest a possible field system, hinting that this was once a working agricultural landscape rather than an isolated monument. A second enclosure, recorded separately as DU014-106, lies nearby, which raises the possibility that the two features are related, perhaps part of the same settlement or land-use complex, though the available evidence stops short of confirming that.

Because the site survives only as a crop mark, there is nothing to see on the ground in any conventional sense. A visitor would find ordinary farmland at Merryfalls, with no visible earthwork, no stone, and no marker. The value of knowing about places like this one lies less in visiting than in understanding how much of the Irish landscape carries invisible archaeology within it. If access to the land were possible and conditions were right, a field showing differential crop growth in dry summer weather might, to a very attentive eye, suggest something beneath. For most people, the aerial photograph held in the national record is the closest encounter available, a reminder that the archive itself is sometimes the site.