The enclosure at Flemingtown is invisible at ground level, its outlines legible only to instruments sensitive enough to detect buried soil disturbances, or to an excavator's trowel. What the landscape conceals here is a sub-square enclosure, a roughly four-sided boundary defined not by standing walls but by a series of ditches cut into the earth, most averaging around thirty centimetres deep. That modest depth is enough to hold a shape that has persisted, unnoticed, for centuries.

The site came to light through a geophysical survey carried out under licence number 050R137 by Nicholls and Shiel in 2005. Geophysical survey is a non-invasive technique that detects anomalies beneath the surface by measuring variations in soil magnetism or electrical resistance, producing maps of buried features without lifting a sod. The results at Flemingtown showed a cluster of such anomalies suggesting a coherent, enclosed form. To test what those readings actually represented, an archaeological excavation was carried out under licence number 07E0057, the findings of which were reported by Elliot in 2007. That work confirmed the ditches were real and structural, forming the sub-square outline the geophysical data had suggested. The townland name, Flemingtown, points to the medieval Flemish settlers who received grants of land in the Dublin area following the Anglo-Norman arrival in Ireland, though the enclosure itself has not been conclusively dated through the available records.

Because the site has no visible surface expression, there is little to observe from a distance and no marker to guide a casual visitor. The surrounding landscape of north County Dublin is largely agricultural, and the enclosure lies beneath farmland that shows no obvious sign of what it contains. The records compiled by Christine Baker and uploaded to the Irish archaeology database in February 2015 remain the clearest public access point for anyone wanting to understand what is here. For those with a professional or research interest, the excavation licence and associated reports provide the primary detail. The site is not a place for casual exploration, but rather one of those quiet entries in the archaeological record that rewards those who read the landscape through its paperwork as much as through the ground itself.