It appears in satellite imagery as a cropmark, a phenomenon that occurs when buried features such as ditches or walls affect how vegetation grows overhead, causing subtle differences in colour and height that only become apparent when viewed from altitude, particularly during dry spells when crops are under stress. The shape in question is roughly fifteen to eighteen metres across and defined by what appears to be a single fosse, or encircling ditch.

This kind of feature is generally identified as a ring-ditch, a term used for circular or near-circular ditched enclosures that in Irish and British archaeology are most often associated with prehistoric funerary or ceremonial use, though their precise function varies considerably from site to site. The Braganstown example was first reported by Jean Charles Caillére, and its presence has since been confirmed across several Google Earth image sets taken on different dates, including captures from April 2011, April 2019, June 2021, and July 2021. The fact that it recurs across multiple years and seasons lends weight to the identification, since a genuine buried feature tends to produce consistent cropmark patterns rather than the random variations caused by soil disturbance or agricultural activity.