It has never been excavated, bears no signage, and appears on no tourist map. What gives it away is a cropmark, the faint but telling difference in colour and height that rippling grain or parched grass can throw up over buried features during dry summers, when buried ditches retain moisture and the vegetation above them grows fractionally taller or greener than the surrounding crop.

Cropmarks of this kind have revealed thousands of previously unrecorded sites across Ireland, and enclosures of roughly this scale are among the most common forms of early settlement in the Irish landscape. A circular ditched enclosure around twenty metres in diameter is consistent with a range of site types, from a ringfort used as a defended farmstead in the early medieval period to a Bronze Age burial monument, though without excavation the date and function remain unknown. This particular site came to light through aerial imagery, identified on both Bing Maps orthophotos and Google Earth orthoimage. It was compiled by Caimin O'Brien on the basis of details provided by Jean-Charles Caillère, and uploaded to the record in November 2021.

There is nothing to see at ground level, which is precisely what makes sites like this worth knowing about. The enclosure sits somewhere within the agricultural land of Moanroe, and the cropmark itself is only likely to be visible from the air or via satellite imagery during dry conditions, when the differential growth that betrays the buried ditch is at its most pronounced. For anyone curious enough to pull up the relevant layers on Google Earth or Bing Maps and scan the fields around Coonagh, the outline can still be traced, a quiet circle pressed into the earth, waiting for someone to look down at the right moment.