That enclosure is a cashel, a type of ringfort built from dry-stone walling rather than earthen banks and ditches, and it sits in a part of Ireland where such structures feel almost inevitable. The Burren's limestone pavements and ready supply of loose field stone made mortarless construction the obvious choice for early medieval farmers and pastoralists, and cashels dot the plateau in considerable numbers, many of them so worn into the terrain that they are easy to pass without registering what they are.

Ringforts, whether built from earth or stone, were the standard form of enclosed settlement in early medieval Ireland, roughly from the fifth to the twelfth centuries, though some were built earlier and many remained in use longer. A cashel is simply the stone variant of the form, the word itself derived from the Latin castellum by way of Old Irish. Most enclosed a single household and its associated outbuildings, providing a defensible perimeter against livestock raids rather than organised military assault. Poulawack's cashel belongs to this widespread tradition, one of thousands scattered across the country, though its setting on the Burren gives it a particular quality. In a landscape already defined by grey limestone, a dry-stone enclosure merges into its surroundings with an ease that earthworks elsewhere do not quite achieve.

The Burren rewards slow movement and close attention. The cashel at Poulawack sits in a townland where the nearby megalithic cairn tends to draw most of whatever interest passes through, which means the ringfort itself is likely to be encountered in relative quiet. The limestone underfoot, the low scrub, and the general flatness of the plateau mean that early features survive with less disturbance here than in more heavily cultivated ground.