Where the more familiar earthwork ringfort was thrown up from ditches and ramparts of soil and sod, a cashel was constructed by stacking limestone or other local stone into a roughly circular enclosure, a form particularly well suited to the rocky, thin-soiled terrain of places like the Burren. Poulawack is already known to archaeologists as the location of a cairn containing a Bronze Age cist cemetery, excavated in the 1930s, which makes the presence of a cashel in the same townland a quiet reminder of how densely layered this landscape is with human activity across millennia.

Cashels of this kind were typically built and occupied during the early medieval period, broadly between the fifth and twelfth centuries, and served as enclosed farmsteads for a single family or small kin group. They were not primarily defensive structures in a military sense, though the walls would have provided some protection for people, livestock, and stores. In a region like the Burren, where limestone pavement and glacially deposited terrain made large-scale tillage difficult, such enclosures were the basic unit of settled agricultural life. The cashel at Poulawack sits within this pattern, one of many hundreds of similar monuments scattered across Clare and the west of Ireland, though the concentration in the Burren is particularly notable given how well stone structures survive above ground in a landscape where the soil has never been deep enough to encourage the kind of intensive ploughing that destroys earthworks elsewhere.

The Burren rewards slow, attentive walking rather than any rush between named sites. The limestone terrain means boundaries between fields, ancient enclosures, and natural rock formations blur into one another, and a cashel wall can seem at first glance simply like another field boundary or a natural outcrop. The townland of Poulawack lies in the eastern Burren, and the proximity of the cashel to the well-documented cairn nearby gives the area a particular density of interest for anyone already making their way through this part of Clare.