The structure is a cashel, the Irish term for a ringfort built from stone rather than earth and timber, and this one measures roughly 17.5 metres in diameter. Its defining wall is no longer fully exposed; turf and grass have crept over much of the stonework, softening its outline until it reads more as a slight rise than a built boundary.

The site lies within an extensive field system at Doonmacfelim, itself a townland whose name carries older layers of meaning and occupation. The low-lying karst terrain around it is characteristic of the wider Burren, where the underlying limestone gives the land a particular character, porous and ancient, with the geometry of old enclosures preserved in ways that wetter or more intensively farmed ground rarely allows. Cashels of this kind are generally associated with early medieval settlement in Ireland, typically dating from roughly the sixth to the twelfth century, though without excavation it is impossible to assign this particular example to a specific period. What aerial and digital mapping has confirmed, through imagery captured between 2011 and 2018, is that the circular plan remains legible despite the partial obscuring of its wall.