Measuring roughly seventeen metres north to south and eleven metres east to west, it is marked by numerous small set stones alternating with larger boulders, and it served, within living memory, as a burial place for children.

The site sits within the western sector of a ringfort, a type of enclosed farmstead typically dating from the early medieval period, built here in the form of a cashel, meaning a stone-walled enclosure rather than an earthen bank. The boulders marking the graves were most likely taken from that same cashel wall. Places like this are known in Irish as cillíní, unofficial burial grounds used for unbaptised infants and others who were, under Catholic practice, excluded from consecrated ground. They were often located at liminal or ancient sites, prehistoric earthworks, boundaries, shorelines, places already set apart from ordinary use. The choice of the ringfort here fits that pattern precisely. According to local knowledge, the ground at Knockaunnagat was still in use until around the mid-twentieth century, which places its last burials somewhere in the 1940s or early 1950s, within the recollection of people who are not yet elderly. That proximity, the fact that this was a functioning place of grief so recently, gives it a different weight than a purely archaeological site.