Most people walking that stretch would take it for a field boundary or a trick of the ground. It is classified as an earthwork, which places it in the broad and sometimes frustrating category of things that are clearly man-made but not easily explained.

What makes this one genuinely curious is what the 1837 edition of the Ordnance Survey six-inch map shows on the same spot: a house with an adjoining field boundary, recorded as a functional building rather than any kind of ancient monument. The enclosure measures approximately 26 metres north to south and 38 metres east to west, sitting on a slight natural rise surrounded by undulating ground. The working interpretation is that what survives is the levelled footprint of a post-1700 house and its associated boundary, gradually reduced by time and use until only the earthen bank remained. The Royal Canal, which was built in stages from the late eighteenth century onward, cut directly through the northern side of the earthwork, which is why the monument has that distinctive flat edge where a curve might otherwise be expected. A ringfort, a type of enclosed farmstead typical of early medieval Ireland, sits some 430 metres to the south-east, making this a small corner of the midlands where different periods of settlement have left their marks at close quarters.

The earthwork sits 95 metres south-west of Kiddy's Bridge, which offers a useful reference point for anyone walking the canal. The bank is visible along the north-east, south, and north-west arcs, though the low-lying rushy grassland means the ground reads differently depending on the season and the light.