That is what archaeologists found at Killacolla, in the barony of Shanid in County Limerick, and the absence of any finds is, in its own way, the most interesting thing about it. The structure is a cist, a type of stone-lined or rock-cut burial box used in prehistoric Ireland, typically to contain a crouched inhumation or cremated remains. This one gave up nothing at all.

The site came to light in September 1989, not because anyone was looking for it specifically, but because excavation was already under way nearby. Archaeologists investigating a short cist, recorded as LI018-01102, found this second feature just 2.5 metres to the east of it. According to the published record compiled from work by Doody in 1992 and 1993, the structure had already been heavily damaged by land reclamation before excavation could document it properly. What remained was an irregular space cut directly into the bedrock, measuring roughly 0.8 metres east to west and 0.7 metres north to south, sealed beneath a large flat slab. Whether it was ever used for burial, was emptied at some point in the distant past, or served some other purpose entirely, the evidence simply does not survive to say.

The site is not marked or interpreted for visitors, and given the damage it sustained during land reclamation, there is very little visible above ground. Its significance now lies almost entirely in the archaeological record rather than anything you could observe in the field. Those with a particular interest in the prehistoric landscape of west Limerick might find the broader Shanid area worth exploring, though the cist itself should be treated as a point on a map rather than a destination. The excavation records, referenced in Doody's reports, remain the most reliable way to understand what was found here and what, notably, was not.