This one at Ballyganner, in the limestone country of County Clare, has largely lost that capacity. What was once a substantial enclosure, roughly 35 metres across, built from what the antiquarian Thomas Johnson Westropp described in 1915 as "large fine masonry", now presents itself as little more than a grass-covered swell of stone on a karst slope tilting southward towards a ravine. A farm track cuts straight across it, and a later drystone field wall has been laid directly on top of the ancient structure along part of its north-east to south-east arc. The site appears on Ordnance Survey maps from 1842 and 1920, though only as an undifferentiated hachured feature, and was catalogued as a "Mound" as recently as 1996, which quietly understates what it once was.

Westropp's account, written when the site was in considerably better condition, gives some sense of its original scale. The enclosure wall was some 2.1 metres thick and stood over 1.5 metres high, with a batter, meaning it was deliberately sloped or tapered outward toward the base for structural stability. He noted that the foundation of a south-east-facing gateway had recently been uncovered at that time: a 1.2-metre-wide opening without post-holes, with one foundation block of the northern jamb still in place. Today the double-faced wall survives only from the north-east around to the south, and even there it barely clears ground level on the interior. Between the south and west, the uncut limestone bedrock on which the wall was originally constructed is still visible beneath the turf. Extending through the interior is what may be a natural cleft in the rock, around ten metres wide and roughly 0.6 metres deep, running north-north-west to south-south-east, with the cashel wall itself overlying it at the southern end, suggesting the builders worked around or over this geological feature rather than choosing to avoid it. The site sits within a large multiperiod field system, and a second cashel lies approximately 45 metres to the north-north-east, with a hut site roughly 39 metres to the south-east, hinting at a once-denser pattern of early medieval occupation across this stretch of the Burren.