It exists, as far as current evidence goes, only as a ghostly outline captured in a single aerial photograph taken in 1971, its circular shape legible from the air but entirely absent at ground level. That invisibility is precisely what makes it interesting.

The enclosure was identified through cropmark evidence recorded in an aerial survey, catalogued as FSI 2, 558/7. Cropmarks form when buried features, walls, ditches, or filled pits, affect how crops grow above them. Ditches tend to retain moisture, producing lusher, taller growth; buried stone foundations do the opposite. From the air, the difference in crop colour and height traces the outline of whatever lies beneath. In this case, the photograph revealed a subcircular enclosure measuring roughly 15 to 20 metres across on its northeast to southwest axis. Enclosures of this general type are common across the Irish landscape and may date from the early medieval period, though without excavation it is impossible to assign a firm date or function to this particular example. The site was compiled by archaeologist Geraldine Stout and added to the record in August 2011.

There is little to see here in the conventional sense, and that is worth stating plainly before anyone makes a special trip. The field sits in the Nethercross barony, a quiet stretch of north County Dublin, and the enclosure leaves no surface trace whatsoever. What the site offers, rather, is a useful reminder of how much of the Irish archaeological record is known only through aerial survey and remains unexcavated, unmarked, and quietly embedded beneath ordinary farmland. Anyone with an interest in landscape archaeology might find it worth locating the general area on a map alongside the Broadmeadow river corridor, where the low-lying ground is typical of the kind of terrain in which early enclosures were established, often near water and on level, workable land.