A cashel is a ringfort built from dry-stone walling rather than earthen banks, a distinction that often reflects the geology of the surrounding area as much as any deliberate architectural choice. Where the ground yields stone more readily than it yields turf or clay, builders used what was at hand, and the result is a structure that can endure for well over a thousand years.

Ringforts of this type were the dominant form of rural settlement in early medieval Ireland, broadly between the fifth and twelfth centuries, functioning as enclosed farmsteads for a single family or a small extended household. The stone wall, sometimes several metres thick, defined a private world of byres, storage pits, and domestic buildings, and offered a degree of protection against cattle raiders if not against any serious military threat. Thousands survive across Ireland in varying states of preservation, but each one is embedded in a specific local history that the landscape alone cannot fully tell. Bunnaconeen, whose name derives from the Irish for the foot or end of a small rabbit warren, sits in a part of Galway where such enclosures are not uncommon, scattered through townlands that have been farmed continuously since long before any written record begins.