What initially attracted attention was a sunken, sub-rectangular marshy area sitting on the eastern side of a naturally raised piece of ground, the kind of slight irregularity in a wet pasture field that can look, from a distance or from the air, like the remnant of something far older.

When the site was surveyed in 2007, investigators measured the depression at a minimum depth of around half a metre and noted narrow channels cut into its sides at regular intervals. Those channels are the telling detail: they are consistent with managed drainage rather than ancient construction, suggesting the feature is most likely a sump or watering hole, the sort of practical arrangement a farmer would dig to collect and control water in low-lying ground prone to waterlogging. The survey ultimately classified it as a non-antiquity, meaning it carries no archaeological designation. Aerial photography taken in September 2002 as part of the ASI programme had flagged it for closer inspection, and by 2017 a Google Earth image confirmed it was still clearly visible as a pond, sitting within a quadrant of an extensive surrounding field system.

The site lies in wet pasture in the townland of Crean, within the Smallcounty barony of County Limerick. Because it is agricultural land with no public access path, anyone curious enough to seek it out should bear that in mind and seek landowner permission before approaching. The feature is most legible from aerial or satellite imagery, where the rectangular outline and the wider field system around it are easier to read than they would be on the ground. At ground level, particularly after heavy rain, the area is likely to be marshy and unremarkable to the untrained eye. Its interest lies less in what it is than in what it illustrates: the process by which surveyors distinguish genuine antiquities from the accumulated, practical reshaping of land by generations of farmers working wet Irish ground.