It is a peculiar condition, shared by many sites across Ireland, where the fact of a place's existence is officially acknowledged while the substance of what it actually is remains opaque. An enclosure, in the broadest archaeological sense, is simply a defined area bounded by an earthwork, a stone wall, a ditch, or some combination of these. In Ireland such features range from early medieval ringforts, which served as farmsteads, to ceremonial enclosures of far greater antiquity. Which category Monanoe falls into is, for now, a matter that the available record does not resolve.

Monanoe is a small rural townland in Clare, a county whose landscape is dense with archaeological survivals, from the limestone pavements of the Burren with their megalithic tombs to the river valleys further east where ringforts cluster on every second rise. An enclosure of any period in this part of the country is not unusual in itself; what lends this particular site a quiet strangeness is precisely the gap between its official existence and the absence of descriptive detail that would let a reader picture it. It has been seen, or at least identified, by someone at some point. It was considered significant enough to record. And yet what the surveyor found, whether a near-perfect circular earthwork or a barely legible crop-mark, remains unspecified.