On the flat, open expanse of the Curragh in County Kildare, a small earthen mound sits quietly beside one of Ireland's more enigmatic prehistoric boundaries. The mound itself is modest by any measure: less than four metres across and only half a metre high, with a flattened top and a narrow surrounding fosse, the term for the shallow ditch that encircles a barrow and typically provided the material from which the mound was raised. It is the kind of feature that could easily be walked over without a second thought, yet its placement tells a more considered story.

The mound sits immediately to the east of a linear earthwork known locally as the Black Pig's Dyke, a name that also appears in connection with similar boundary earthworks elsewhere in Ireland, particularly in Ulster, where comparable ditches and banks were long associated in folklore with the rootings of a supernatural pig. Whether the Curragh example shares any direct relationship with those northern monuments is unclear, but the name and the form place it within a broader tradition of large-scale prehistoric landscape division. Two other possible barrows lie within roughly twenty metres, one to the west-northwest and one to the southwest, suggesting this may not be an isolated burial monument but part of a small cluster, perhaps marking or respecting the line of the earthwork beside them. The site was identified through aerial photography in 1999, which remains one of the most effective tools for detecting low, grass-covered earthworks on open ground like the Curragh.