Before drainage works on the River Inny in the 1960s altered the local water levels, this low mound sat out in the lake itself, and it almost certainly began life as a crannog, an artificial or artificially enlarged island built from timber, stone, and brushwork, typically during the early medieval period, and used as a defended dwelling or place of refuge.

When the Inny drainage works lowered the water in the late 1960s and reclaimed the lakebed, the landowner at the time, Oliver Ennis, observed a cluster of oak posts protruding through the newly exposed surface. Those posts have since disappeared entirely, leaving no visible structural trace. Around the same period, a dug-out canoe was found close by and inspected by the National Museum of Ireland, a pairing that fits a familiar pattern: crannogs and their associated watercraft often come to light together when lake levels drop or land is reclaimed. Whether this site is identical to a separately recorded monument in the same general area remains unresolved.

The site sits on private agricultural land, and there is little for the eye to catch now beyond that slight swelling of ground. Its interest lies less in what can be seen than in what the sequence of events reveals: a medieval island settlement that survived intact beneath the water for centuries, briefly announced itself through rotting timber when the lake retreated, and then quietly vanished again into the soil.