It sits roughly 33 metres northwest of the townland boundary with Oldtown, in ground that has been cut through by land drains and watercourses over many decades of agricultural improvement. No amount of walking the field will reveal it to you; the only record of its existence as a visible feature comes from a single aerial photograph taken in 1986, in which it appeared as a faint, circular-shaped cropmark. By the time satellite imaging arrived, it had vanished entirely from view.

The monument is a ring-barrow, a type of prehistoric funerary monument typically consisting of a low central mound surrounded by a ditch and an outer bank, though in this case nothing of that structure is perceptible at ground level. What makes its situation particularly interesting is that it does not stand alone. It is one of five monuments arranged in a rough northeast-to-southwest alignment along the Castlefarm and Oldtown townland boundary, spread across approximately 165 metres. The complex includes a standing stone and three ring-barrows in addition to this one, along with an enclosure. The alignment suggests deliberate, considered placement by the people who built them, though none of the five monuments appear on the Ordnance Survey's historic maps, meaning they escaped cartographic notice entirely until aerial survey work carried out as part of the Bruff aerial photographic survey in 1986 brought them to light. The site was compiled for the archaeological record by Alison McQueen and Vera Rahilly, with details uploaded in November 2020.

For anyone curious enough to visit the general area, the landscape around Castlefarm is typical of improved lowland Limerick farmland, crossed by drainage channels and offering little surface drama. Accessing the field itself would require the landowner's permission. The aerial photograph from the 1986 Bruff survey, referenced as AP 5/2047, remains the clearest visual evidence for this particular barrow. Cropmarks of this kind are most legible from the air during dry summers, when differential soil moisture above buried features causes variations in plant growth. On the ground, in any season, there is presently nothing to see.