In the townland of Acres in north Kerry, a ringfort once known as Lissamogha, or in Irish Lios an Mhacha, meaning the ringfort of the milking-place, has been completely levelled, leaving no surface trace whatsoever. A ringfort is a roughly circular enclosure, usually defined by one or more earthen banks and ditches, that served as a defended farmstead during the early medieval period in Ireland. This one carried in its name a specific domestic detail, a reference to the macha, the outdoor milking yard, suggesting it was a working agricultural settlement rather than a site of ceremony or defence alone.

The fort appeared on Ordnance Survey maps produced in 1841 to 1842, and again on those revised in 1914, each time represented as a circular enclosure. That seventy-year gap between surveys is quietly significant: it means the feature was still legible in the landscape at the turn of the twentieth century, which makes its subsequent disappearance a relatively recent loss. C. Toal's North Kerry Archaeological Survey, published in 1995, records it under entry number 153, noting the complete levelling and the absence of any surviving earthworks. Whatever combination of agricultural improvement, land clearance, or ground disturbance removed it, nothing now marks the spot.