It measures roughly 125 metres on its longer axis, defined by a scarp along its south-eastern edge, and it appears on the Ordnance Survey 25-inch map with enough clarity to suggest it was once a deliberate and considered feature of the surrounding landscape. The most likely explanation is that it is a ha-ha, a sunken boundary wall or ditch designed to separate a formal garden or lawn from open pasture without interrupting the view from the house. The trick of the ha-ha, widely used in eighteenth-century landscape design across Britain and Ireland, was that the drop was invisible from the house side, giving the impression of an unbroken sweep of countryside while still keeping livestock out.

The feature sits in grassland close to a ringfort recorded about 90 metres to the north-east, a reminder that designed estates in Ireland were frequently laid out across land with a much older human history layered beneath them. The ringfort itself, a roughly circular enclosure of the early medieval period typically used as a farmstead, would have been a visible presence in the landscape long before any Georgian garden planner arrived. The D-shaped outline, visible on aerial imagery taken between 2011 and 2013, is otherwise undocumented in any surviving paper record. Whatever house or household commissioned this feature, their plans and correspondence have not come down to us.