The enclosure measures roughly 22 metres north to south and 24 metres east to west, its perimeter wall rising to about 0.9 metres. A series of drains runs around the outside, and the whole thing sits near the base of a north-facing slope, in land that has long since returned to ordinary pasture. What makes it less ordinary is what lies within: a burial ground.

Enclosures of this kind are a recurring feature of the Irish landscape, ranging from early medieval ringforts to ecclesiastical enclosures associated with early Christian communities. The presence of a burial ground inside this one shifts it towards the latter category, suggesting it may have functioned as a sanctified space at some point, though the precise origins and period of use remain unclear from what survives above ground. The surrounding drains are a practical detail worth noting; low-lying ground near slopes tends to accumulate water, and managing that drainage would have been as necessary for the living as for the dead. The name Cashelfean itself contains the element "cashel", an Anglicisation of the Irish "caiseal", meaning a stone fort or enclosure, which fits the physical evidence and hints at a longer memory of the site embedded in the placename.