Somewhere in the coniferous plantations of Kilclooney, a nearly perfect earthen ring sits quietly beneath the trees, unannounced and largely unvisited. It is the kind of thing that reveals itself gradually, a low but continuous bank curving through the forest floor, enclosing a roughly oval space about 39 metres north to south and 35 metres east to west. The bank is not dramatic in height, rising to around a metre on the upslope eastern side, but it is complete, unbroken all the way around, and accompanied on the outside by a fosse, the shallow ditch that was dug to provide the material for the bank itself. A narrow entrance gap, just under two metres wide, opens to the north-north-west.

Enclosures of this type, a circular or subcircular area defined by an earthen bank and outer ditch, are found across Ireland and belong to a broad category that archaeologists group loosely under the term "embanked enclosure." The term covers a wide range of possible functions and periods. Some served as ringforts, the farmstead enclosures that were built in their thousands during the early medieval period, roughly between the fifth and twelfth centuries. Others may have had ceremonial or funerary purposes reaching back considerably further. Without excavation it is rarely possible to say which category applies. What survives at Kilclooney is the earthwork itself, sitting on the shoulder of a north-west-facing slope, the bank holding its shape after however many centuries, the fosse still legible as a depression running to the north-east and south-west of the structure.

The surrounding conifer plantation both preserves and obscures the site. The dense canopy suppresses undergrowth, which can make the earthworks easier to trace on foot once you are inside the forest, but the trees planted within the enclosure itself complicate any reading of the interior. The entrance at the north-north-west is the clearest point of orientation; that narrow gap in the bank, less than two metres across, is where the geometry of the place becomes most legible.