It appears on no modern map, leaves no mark on the grass above it, and cast no shadow visible from the air when aerial photographs were taken in November 2011. The only real evidence that anything was ever here is cartographic, a moment of Victorian record-keeping that captured something the landscape has since swallowed entirely.

The 1837 Ordnance Survey Fair Plan, one of the meticulous working documents produced during the first great mapping of Ireland, annotated this spot as a fort. The six-inch OS map of the same year went further, depicting a small circular earthwork rendered in hachures, the fine radiating lines that nineteenth-century cartographers used to indicate raised or mounded ground. The feature was almost certainly an earthwork of the kind commonly found across the Irish midlands, a low circular enclosure of the sort sometimes associated with ringforts or their outliers. A ringfort does survive about 150 metres to the east, which suggests this area once held a cluster of such features, as was not unusual in early medieval Ireland when ringforts, circular earthen enclosures typically used as enclosed farmsteads, were built in considerable numbers across the countryside. The Windtown earthwork, however, did not survive into later OS editions, and by the time aerial survey technology existed to look for it, even the cropmark that disturbed soil or buried stonework sometimes produces in dry summers was absent.