The example at Coolacoosane in North Cork sits quietly in pasture on a south-facing slope, its circular form spanning roughly thirty metres across. What marks it out is the same thing that marks out so many of its kind: the sense that the landscape has simply grown around it, accommodating it without explanation.

A ringfort, or rath, is an enclosed farmstead of the early medieval period, typically dating from somewhere between the sixth and tenth centuries. Farmers and their families lived within the enclosing bank, which served as a boundary marker and a modest defence for livestock against both human interference and animal predators. At Coolacoosane, the earthen bank still stands to an internal height of around 0.65 metres, with an external fosse, essentially a surrounding ditch, reaching a depth of up to 0.4 metres. The bank itself has been planted with deciduous trees at some point, meaning the whole structure now reads as a rough ring of vegetation within the field. The interior is heavily overgrown, which is typical of sites that have passed out of active use but have never been levelled or ploughed away, a fate that has claimed a considerable number of their counterparts elsewhere.