What survives is a cashel, a type of ringfort built from drystone walling rather than earthen banks, its roughly circular outline stretching some 38 metres east to west. The wall itself has long since been grassed over, reducing what was once a substantial enclosure to a gentle undulation in the ground, easy to walk past without a second glance.

Cashels of this kind were typically built during the early medieval period, roughly between the fifth and twelfth centuries, and served as enclosed farmsteads for single family units or small communities. They are more common in the west of Ireland, where stone was more readily available than the earth and timber used further east. The Ballybrone example is poorly preserved, and two gaps in the wall at the north-east and south-west are thought to be modern intrusions rather than original entrances. Beyond those details, the site keeps its history to itself; no excavation records or associated finds appear to have been documented, leaving open questions about who built it and when it fell out of use.