The feature does not announce itself with a plaque or a mound you could easily mistake for a natural rise in the ground. It survives, if it survives at all in any visible form, as a cropmark or soil shadow, the kind of thing that only becomes legible from the air.

The evidence for this enclosure comes from a single aerial photograph taken in 2007, identified by Martin Reid of the ASI Archive Unit and subsequently recorded by archaeologist Geraldine Stout. Circular enclosures of this kind are a recurring feature of the Irish archaeological landscape, appearing in many forms across many periods. They might represent a ringfort, which was a farmstead enclosed by an earthen bank and ditch, common throughout early medieval Ireland, or something older still, perhaps a Bronze Age or Iron Age ritual or settlement site. The notes do not specify the period or character of this particular feature, and without excavation or further survey, that question remains open. What the aerial photograph does confirm is that something was deliberately shaped here, in ground that has since been absorbed into a managed landscape of avenues, polo grounds, and ornamental plantings.

The Phoenix Park is freely accessible throughout the year, and the southern section near Chapelizod can be reached from the Chapelizod Gate. There is nothing to see at ground level that would mark the spot for a casual visitor, and the enclosure is not signposted or formally interpreted anywhere within the park. Those interested in the broader archaeology of the area might find it worth consulting the Archaeological Survey of Ireland records before visiting, since aerial archaeology of this kind is best appreciated with a map in hand, one that lets you orient yourself to what the camera once saw from above.