At Palmerstown in County Galway, a circular enclosure roughly 23 metres in diameter was once defined by a ring of large upright slabs, the kind of arrangement that in the Irish landscape tends to indicate an enclosure of some antiquity, possibly prehistoric, possibly early medieval. Today, nothing of it remains above ground. There is no visible surface trace.

The site appears by the name 'Carraun' on the first edition Ordnance Survey six-inch map, which places it firmly in the record by the mid-nineteenth century. By the time the more detailed 1:2500 plan was revised between 1912 and 1916, the feature was still plotted but had lost even its name. The most substantial description comes from McCaffrey, writing in 1952, who classified it as a circular enclosure and noted the defining ring of large slabs, a form of boundary occasionally associated with early settlement or ritual use in the Irish archaeological record. What those slabs marked, and what became of them, is not recorded.