Clearance cairns are exactly what they sound like, the accumulated result of picking stones from agricultural ground and piling them somewhere out of the way. Yet that mundane origin places these mounds within a settlement of surprising density, one that includes eight houses, eight animal shelters, a network of field walls, and even the remains of an iron smelting site at the island's western end. The whole complex, spread across the summit and eastern slopes of Canroe and down to the rocky shoreline, suggests a community that was thoroughly, industriously at home on a small island most people today would consider remote.

The archaeologist M. J. O'Kelly investigated the site in the early 1950s, excavating two of the houses, one animal shelter, and one of the cairns. Fourteen of the fifteen cairns cluster on the eastern side of Canroe, with a single outlier positioned closer to the houses on the west. The excavated cairn, located roughly 55 metres north-east of one of the houses, was well preserved: 3.5 metres in diameter and half a metre high, built from small stones. It yielded no finds at all, which is consistent with a clearance origin rather than a funerary one. The absence of objects is, in its own way, informative. These were not burial monuments or ritual deposits; they were simply where the stones went.

Beginish sits between Valentia Island and the Kerry mainland at the northern end of Valentia Harbour, and at certain low tides its south-eastern sandbar connects with the adjacent Church Island. That shifting, tidal geography is part of what makes the place feel genuinely apart, a small island with traces of a life lived fully and practically, whose most visible monuments are piles of cleared rubble.