This is a rath, the Irish term for a ringfort, which was the most common form of rural settlement in Ireland from roughly the fifth to the twelfth century. Typically a circular enclosure of earthen bank and ditch, a rath would have protected a farming family, their livestock, and their grain. This one at Finned measures approximately thirty-two metres in diameter, its enclosing bank still visible from the south-south-west around to the north, though worn down to between ten and forty centimetres in height.

What makes this particular example quietly interesting is not the monument itself so much as the detail still legible in what remains. Two very large boulders were deliberately incorporated into the bank at the north and north-north-west, which suggests the builders were working around, or actively using, substantial stones already present in the landscape. In places, traces of stone facing survive on both the inner and outer sides of the bank, a construction technique that would have given the original enclosure a considerably more solid appearance than the low grassy ridge visible today. Attached to the outer face of the bank on the south-west side is a semi-circular structure built in drystone walling, thought to be the remains of an animal shelter. Inside the enclosure, the southern half is largely taken up by what appears to be a house site. A souterrain, the term for an underground stone-lined passage often used for storage or refuge, was recorded as associated with the site, but no physical remains of it could be identified on the ground.