These circular earthwork enclosures, known in Irish as raths, were the dominant form of rural settlement in early medieval Ireland, roughly between the fifth and twelfth centuries. Typically defined by one or more banks and ditches, they served as farmsteads for families of varying status, and Ireland still holds somewhere between thirty and forty thousand surviving examples. The one at Rylane is among them, though it has so far attracted little in the way of published attention.

Clare is unusually dense with this kind of monument. The county's limestone landscape, much of it thin-soiled and never heavily ploughed, has preserved earthworks that elsewhere were levelled long ago by agricultural improvement. A rath in this setting would once have enclosed a family's house, outbuildings, and animals, with the enclosing bank functioning as both a boundary marker and a modest defence against opportunistic raiding. The specific history of the Rylane example, including when it was built, who occupied it, and what if anything survives above ground, remains to be documented in any accessible published form.

For anyone passing through this part of Clare, the broader landscape itself rewards attention. Ringforts in the region often appear as low circular rises in fields, sometimes marked only by a rim of scrub or a slight change in vegetation, their interiors occasionally still faintly hollow. Local farmers have long regarded these sites with a mixture of respect and wariness, a tradition connected to beliefs about fairy forts that has, not incidentally, helped preserve many of them from the spade.