At Ballylusky in County Cork, the central one of this cluster sits on level ground that is now under tillage, meaning that centuries of ploughing have reduced whatever earthen banks or ditches once defined it to the point where nothing is visible at ground level. A rath, to use the Irish term, was typically a roughly circular enclosure formed by one or more banks of earth, used as a farmstead during the early medieval period. That five should appear in such proximity, aligned with one another, makes this a genuinely odd arrangement in the Irish archaeological landscape, where individual raths are common but tight clusters like this are far less so.

The site appears on Bateman map 50, dated 1716 to 1717, marked with the symbol then used to denote a so-called Danish Fort. That label was a common eighteenth-century misattribution; antiquarians of the period tended to assign impressive or puzzling earthworks to Viking or Danish agency, though in reality the vast majority of such features date from the early medieval Irish period, centuries before significant Scandinavian presence in the Irish countryside. The fact that it was considered worthy of marking on that map suggests it was still a recognisable feature of the landscape in the early eighteenth century. Whatever remained above ground at that point has since been lost to cultivation.