The example at Ballynote in County Clare is one such site, a rath, which is the Irish term for a ringfort defined by earthen banks rather than stone, and it belongs to a category of monument so common in the Irish countryside that it is easy to walk past one without registering what you are looking at.

Raths were typically built between roughly 500 and 1000 AD, though some are earlier or later, and they functioned primarily as enclosed farmsteads for free farming families. The circular bank and ditch, sometimes with a second or third outer ring for higher-status occupants, defined the boundary of a household's domestic space and offered a degree of protection for livestock as much as for people. Clare is particularly dense with such monuments, its landscape shaped by centuries of this dispersed settlement pattern rather than nucleated villages. The Ballynote example sits within that broader tradition, a low but legible feature in the townland that carries the same place-name, townland names in Ireland frequently preserving a memory of the agricultural or territorial significance a site once held.