Roughly five metres long and barely half a metre deep, it tapers as it runs from north-northeast to south-southwest, and no stonework is visible within it or along its edges. What makes it worth attention is what it might be: a possible souterrain, the collapsed or filled remnant of an underground passage of the kind that early medieval communities in Ireland used for storage, refuge, or both. These stone-lined tunnels were built beneath or beside inhabited enclosures, and their entrances often disappear so completely into the landscape that only a tell-tale depression remains.

The hollow sits inside a rectangular cashel, a type of drystone-walled enclosure associated with early medieval settlement in Ireland. That enclosure is already a layered place. Just three metres to the northeast lies the remains of a house site, and a second souterrain, a confirmed one this time, extends from the cashel's northern wall. The concentration of features within a small area, domestic structure, underground passage, and possible second passage, suggests a settlement of some complexity, even if almost nothing of it is now visible above ground. Further out, roughly 54 metres to the west-southwest, stands a wedge tomb, a prehistoric megalithic monument that predates the cashel by thousands of years. Its proximity is likely coincidental in terms of function, but it means the ground here has been significant across several distinct periods of human activity.

The site sits on land used as elevated winter pasture, which goes some way to explaining its condition. Grazing ground rarely gets the scrutiny of more accessible or dramatic monuments, and features like this one can remain quietly uncertain for generations, neither confirmed nor ruled out, simply waiting in the grass.