That phrase, lifted directly from their field notebooks, is a small signal that even experienced cartographers measuring earthworks across the Irish countryside found this one worth remarking upon. The enclosure sits in pastureland close to the western boundary with Athalacca North, roughly 450 metres east of the River Maigue, and what made it unusual then still distinguishes it now, namely its sheer scale.

When first recorded on the Ordnance Survey six-inch map of 1840, the monument appeared as an oval-shaped platform roughly 100 metres across on its northeast-to-southwest axis, defined by a scarp, which is essentially a steep slope or edge formed by the original enclosing bank. Enclosures of this type are broadly understood as large prehistoric or early medieval earthworks, though their functions varied considerably, from settlement to ceremonial use. By the time the 25-inch map was published in 1897, the monument had already been partially levelled, with hachures, the short lines surveyors used to indicate a bank or slope, appearing only along the northern and western arc where the bank met the townland boundary. That boundary itself tells part of the story: the curving line running from east to south-southeast follows the original bank so closely that the bank effectively became the boundary, preserved not through deliberate protection but through the practical logic of farmers dividing land. On the southwest, west, and northwest sides, however, the original bank was removed and replaced by a straight-sided post-1700 field boundary, reshaping what was once an oval into the D-shaped enclosure visible on aerial photography today.

The monument is most legible from the air. Aerial photographs taken in October 2002 under the Archaeological Survey of Ireland's programme show it clearly, as do Google Earth orthoimages, where the D-shape resolves neatly against the surrounding fields, the straight western side marking where the old bank was lost. On the ground, the site sits in working pasture, and the surviving bank along the eastern arc is tree-covered, which helps define its line but also obscures the scarp beneath. A modern gap in the bank exists at the north. The dimensions now run to approximately 85 metres north-to-south and 83 metres east-to-west, somewhat reduced from the original oval, but still substantial enough that standing at the edge and tracing the treeline gives a reasonable sense of what the surveyors of 1840 were looking at when they reached for the word uncommon.