On a small knoll in the rolling pastureland of Townplots in County Mayo, there is nothing to see, and that absence is precisely what makes the place worth knowing about. A circular enclosure, roughly ten to fifteen metres in diameter, appears clearly on Ordnance Survey six-inch maps from both 1838 and 1922, labelled with the name Knockbeg. Walk the same ground today and there is no visible trace of it whatsoever.

The enclosure itself belongs to a class of small circular earthworks found throughout Ireland, the kind that might once have served as a ringfort, a burial mound, or some form of enclosed settlement, though without excavation the precise function of this one cannot be established. What the two OS map appearances do confirm is that the feature was legible in the landscape at least into the early twentieth century, and had a recognised place-name attached to it. The name Knockbeg, from the Irish Cnoc Beag meaning little hill, suits the topography exactly: the surrounding pasture is dotted with small drumlin-like knolls, and the enclosure sat on one of these modest elevations. Adding a layer of quiet interest, a comparable enclosure survives some eighty metres to the south-east, suggesting this small corner of Mayo may once have held more structured activity than its current empty fields imply.