The modern fence arcing across the pasture at Corran does not follow the logic of the landscape or the convenience of a laneway; it follows the line of an old rampart, and local memory has long known what that means. The place is called a lios, the Irish term for a ringfort, the circular or near-circular enclosures built across Ireland from the early medieval period onward, typically as enclosed farmsteads for a single family or household.

The curve spans roughly two thirds of what would have been the full circuit. A 1939 account by Hartnett recorded that the diameter was approximately 240 feet, and that the modern fence was already at that point running along the old rampart line. The Ordnance Survey six-inch map of 1842 shows a similar enclosed area, with the arc continuing further to the east-southeast than it does today. That same map also recorded a smaller, roughly quadrangular enclosure, measuring around 22 metres by 30 metres, sitting against the inner side of the fence in the north-east quadrant, though no trace of that secondary feature survives above ground now. The overall enclosed area today measures approximately 85 metres north-west to south-east and 80 metres north-east to south-west, dimensions broadly consistent with the original ringfort circuit.

What makes Corran quietly worth noticing is precisely how little drama there is to it. The earthwork itself is gone, absorbed into pasture. What survives is a fence line that bent itself around something old and never quite straightened out, a curve in an otherwise ordinary agricultural boundary that carries, in its shape alone, the outline of a place people once lived inside.