The structure is a cashel, a type of ringfort defined by a substantial drystone enclosing wall rather than an earthen bank, and this one is a particularly solid example, with walls built in straight sections of large inner and outer facing stones packed around a rubble core. The wall runs to between 1.9 and 2.4 metres thick, and still stands over two metres high at its northern arc, which gives some sense of the scale of the original construction.

The roughly circular enclosure measures about 35 metres in diameter and sits at the north-eastern end of a narrow strip of deciduous woodland, surrounded by level pasture. At some point in the seventeenth century, a church was built into the northern half of the interior, making use of the existing enclosure in a way that was not uncommon in post-medieval Ireland, where earlier sacred or liminal sites were frequently absorbed into Christian use. The church was later extended, and then in the late nineteenth century the Bingham family added a mausoleum to the compound. Both interventions left their mark on the cashel wall itself: a wide piered entrance was cut through the south-eastern section to allow access to the newer structures, and a portion of the wall at the west-north-west was narrowed to just 1.3 metres to make room for the mausoleum's footprint. The result is a site where the archaeology of several distinct periods is physically legible in the stonework, each era having negotiated with, rather than simply replaced, what came before.