Discovered in 1997 when land reclamation work accidentally uncovered human bones and stone slabs, this 25-metre-wide platform cairn sits low against the landscape, constructed from water-rolled boulders placed directly onto the sand. Archaeological excavations revealed that the monument was likely first built during the Bronze Age, evidenced by two small rectangular stone cists incorporated into its structure; one measuring just 55cm by 30cm, the other slightly larger at 70cm by 50cm, both containing only sand when discovered.

The cairn’s significance extends far beyond its Bronze Age origins, having been reused as a burial ground multiple times throughout history. During the Iron Age, specifically in the 2nd or 1st century BC, cremation burials were added to the monument. Excavators found two small bowl-shaped pits near the centre containing mixtures of cremated bone, charcoal, and dark-stained sand. The site saw renewed use in the Early Historic period, with radiocarbon dating revealing burials from the 5th century AD; four or possibly five women were interred in slab-lined long cists, their bodies laid out in an extended position with heads pointing west. The practice continued into the 7th century AD when seven more individuals, also female, were buried in simpler graves dug into the sand, some with stones carefully arranged around their heads for protection.

The cairn’s location on the northern bank of the River Erne is particularly significant, as this waterway served as an important territorial boundary during the Early Historic period. Archaeologists believe the monument represents a boundary ferta, an ancestral burial place where communities interred their dead at crucial moments in history. Interestingly, all the later burials carefully avoided the central area of the cairn, suggesting that a smaller cairn may have once crowned the summit of the structure, commanding enough respect to remain undisturbed even as generations continued to use the site for their most solemn rituals.