The ringfort at Cloonteens in north Cork is, to the eye walking past it, little more than a gentle saucer-shaped rise in a pasture field. The earthwork has been levelled, its bank long since reduced to a scarp barely 0.4 metres high, with only the faintest internal lip hinting at the enclosed space that once existed here. Yet when crops grow in the field, the circular ring becomes clearly visible from above, the differential in soil depth and moisture tracing the outline of an enclosure that would have been a farmstead, probably in the early medieval period.

A ringfort, also known as a rath, was typically a single-family agricultural settlement enclosed by one or more earthen banks and ditches, with the bank serving as a boundary against livestock straying and as a modest defensive perimeter. At Cloonteens, the surviving raised area measures roughly 33 metres east to west and 31 metres north to south, figures consistent with the roughly 40-metre diameter recorded on Ordnance Survey six-inch maps from 1842, 1905, and 1936, which depicted the site as a hachured circular enclosure. By 1842, a limekiln was already noted on the north-western bank, a kiln used for burning limestone to produce agricultural lime, suggesting the site had been put to practical use even as the earthwork still stood. When J. Bowman recorded the fort in 1934, it was on the land of a William Cremin, and the bank still rose to around seven feet, the fosse or ditch having been infilled. Bowman also noted a cavity in the north-western bank, roughly eighteen feet long, three feet wide, and eight feet deep, the nature of which was not explained but which may have represented a souterrain, an underground stone-lined passage sometimes associated with early medieval ringforts and used for storage or concealment.