A small circular embanked enclosure, roughly fifteen metres across, was recorded in the 1839 edition of the Ordnance Survey six-inch map, making it one of the earliest systematic cartographic records of the Irish landscape. Today, nothing is visible at ground level. The mound, or whatever once gave the feature its modest earthen outline, has been absorbed so completely into the surrounding farmland that only the cartographic record preserves its existence.

The site sits on fairly level ground at a point where two field banks now converge, with a small stream running roughly northwest to southeast about a hundred metres to the south. This kind of small circular embanked enclosure is a category of monument that appears across Ireland in various forms, sometimes the remnant of a ringfort, a burial mound, or an enclosure whose original purpose has long since become unclear. Without excavation, the function of the Knocktown example remains unknown, and the landscape itself offers no obvious clues. What is notable is precisely this quality of absence: a feature significant enough to be mapped by nineteenth-century surveyors, yet so thoroughly eroded or levelled since that the land presents a perfectly ordinary face to anyone walking across it.