At Dinneens in County Kerry, a circular enclosure, the kind of ringfort-type boundary that once organised farmsteads and livestock across early medieval Ireland, appears clearly on the Ordnance Survey maps of 1842 and on later OS editions. By the time serious attention was paid to it, however, the feature had already been levelled, most likely in the mid-twentieth century during agricultural improvement works. No earthwork, no crop mark visible to the casual eye, no dip in the field surface remains to suggest anything was ever there.

The enclosure was recorded as lying two fields to the south-west of another nearby monument, which gives some sense of how densely this part of north Kerry was once marked by such features. Circular enclosures, typically defined by a raised bank and external ditch, were among the most common settlement forms in early medieval Ireland, used to define and defend a family's living and farming space. That this one was still legible on a map made in 1842 suggests it had endured in some form for well over a thousand years before being erased within living memory. C. Toal documented it in the North Kerry Archaeological Survey, published in 1995, where it is listed without any surviving physical description beyond its mapped outline and general location.