It belongs to a category of monument known as a ring-ditch, the buried remnant of a circular trench that once surrounded a central area, most likely associated with prehistoric burial or ritual activity. Nothing of it can be seen today at ground level, and the site has since been built over. Its existence is known from a single aerial photograph.

The photograph in question, catalogued as FSI 497/8, was taken in 1971 and recorded the feature as a cropmark. Cropmarks form when buried ditches or pits affect the moisture and nutrient levels available to surface vegetation; crops or grass above a filled-in ditch tend to grow taller or greener, revealing the shape of what lies beneath when viewed from above, particularly during dry summers when the contrast is most pronounced. This particular mark, circular and approximately fifteen metres in diameter, appeared on the strand at Burrow and was later compiled as part of the archaeological record by Geraldine Stout. Without the aerial survey, it is unlikely the site would have entered the record at all.

There is little for a visitor to observe directly. The location is on Portmarnock Strand, north of Dublin city, and the ground above the former ring-ditch has been developed. No marker indicates what lies beneath, and the monument is not accessible or interpretable in any conventional sense. It is, in a way, a site that exists almost entirely in archive rather than in landscape, a reminder that the archaeological record along Dublin's coastline is considerably fuller in the air than it appears on foot.