It is not visible at ground level, which is itself a peculiar condition for a site of this kind. Enclosures in the Irish archaeological record typically refer to defined areas bounded by earthen banks, ditches, or stone walls, and they served a range of purposes across prehistory and the early medieval period, from settlement and agriculture to ritual use. This one occupies a low natural hillock in an upland area, a setting that would once have given it a degree of prominence in the surrounding landscape.

The irony of its situation is considerable. A feature that was likely raised or delineated to be noticed, to mark something out on higher ground, is now not only invisible but buried beneath industrial infrastructure. The precise nature or date of the enclosure is not recorded in detail, and without excavation it remains difficult to say more about who made it or when. What is clear is that the low hillock it sits on is a natural feature, not a constructed one, and that whoever chose the spot did so with some sense of its position in the upland terrain around Kilmastulla.