The feature is invisible at ground level, detectable only through geophysical survey, and that invisibility is part of what makes it interesting. It survives not as a monument you can walk around but as a signal in the soil, a trace of deliberate human activity that the landscape has quietly absorbed.

The ditch was identified during a geophysical survey, carried out under Licence no. 12R127, by the Discovery Programme as part of its 'Late Iron Age and "Roman" Ireland' project, and is recorded in work by Dowling dating to 2014. It measures approximately fifteen metres in diameter and is classified as a ring-ditch, a term that typically describes the filled-in remains of a circular enclosure or funerary monument, often a ploughed-out burial mound whose surrounding ditch is all that survives beneath the topsoil. The fact that even this remnant has been truncated, cut through by a later field ditch, places it within a long sequence of land use in which earlier features are routinely obscured or destroyed by more recent ones. Drumanagh itself is a site of considerable archaeological interest, the broader promontory having attracted attention in connection with questions about late Iron Age activity and possible contact with the Roman world, which gives even a modest sub-surface feature like this a degree of wider context.

Because the ring-ditch is a geophysical rather than a visible surface feature, there is nothing to see in the conventional sense. The Drumanagh promontory is privately held land and access is not straightforward. For those with a particular interest in the archaeology of the area, the published survey data and the Discovery Programme's research outputs are the most practical means of engaging with this feature. What the site rewards, above all, is an appreciation of how much of the Irish archaeological record exists not as upstanding ruins but as patterns of disturbed earth, readable only through the instruments and methods of modern survey work.