The one at Aghavadden, on low ground about two hundred metres west of the northern tip of Lough Reane in County Leitrim, does neither of those things. It is D-shaped rather than round, its interior bank has been reduced to a barely perceptible rise of around a quarter of a metre on the inside, and there is no visible fosse at all. A later field bank has cut straight across the south-east side, flattening the curve and giving the monument a flat edge it was never designed to have. The overall effect is of something that has been quietly edited by centuries of agricultural use until it is almost unrecognisable as what it once was.

The enclosure measures roughly thirty metres north to south and twenty-eight metres east to west. Its defining feature is an earthen bank, two to four metres wide, which at some point had a stone wall laid over it, though both elements are now heavily overgrown. No original entrance survives in any identifiable form. Ringforts of this kind were typically built during the early medieval period, roughly the fifth to twelfth centuries, and served as enclosed farmsteads for a single family or small community, the encircling bank providing a boundary as much social and legal as it was defensive. That this one sits in low-lying ground, rather than on a commanding ridge, is itself a small curiosity; the location near the lough shore may have been chosen for access to water and grazing rather than for any strategic advantage.