This is a rath, the Irish term for a ringfort, one of the most common early medieval monument types in Ireland, typically built between roughly 500 and 1000 AD as an enclosed farmstead for a single family and their livestock. What makes the Latnakelly example quietly interesting is how thoroughly the surrounding countryside has grown over and around it, so that the boundary between ancient enclosure and working farm is genuinely blurred.

The earthwork measures approximately 34 metres north to south and 30.5 metres east to west, making it a modest but respectable example of the type. Its defining feature is an overgrown earthen bank, best preserved at the south-south-east, where it reaches 0.7 metres in external height with a base width of around 3 metres. There is no visible fosse, the external ditch that typically accompanies such a bank, which may reflect either the original design or centuries of silting and vegetation. The entrance, also about 3 metres wide, faces east-north-east, an orientation seen frequently in Irish ringforts and possibly linked to practical or symbolic preferences of the period. Outside the ancient bank, later field boundaries have settled into the same ground: a hedge and field bank running north to south-south-east, a drainage channel alongside it, and a masonry wall to the west-north-west where a farm road passes. These layers of agricultural use sit so close to the earthwork that the rath functions less as a monument apart from the land and more as one stratum among several. Since 1968, when aerial photography captured the site in a more open condition, the interior has become increasingly overgrown, and the enclosure is now largely defined by what surrounds it rather than what can be seen within.