It is stone-lined, about seven metres across and a metre deep, with a slightly raised rim running around its top edge. Tidy, deliberate, and clearly the work of human hands, it sits in ordinary pasture without any obvious purpose attached to it.

What makes it quietly puzzling is its absence from the Ordnance Survey maps of 1838 and 1922, which recorded the Irish landscape in considerable detail. That gap suggests the structure either post-dates those surveys or was simply missed, and the current assessment leans toward it being of relatively recent origin. It was picked up during a local survey and added to the Record of Monuments and Places in 1997, classified loosely as an enclosure, though that label describes its shape rather than its function. The neighbouring earthwork to the south is a rath, a type of circular enclosure, usually of early medieval date, typically defined by an earthen bank and used as a farmstead or settlement. Whether the stone-lined hollow has any relationship to that older feature, or whether it belongs to an entirely separate and more recent period of activity, remains an open question.