What survives on an east-facing slope in the undulating grassland of Castlelambert, County Galway, is a curving bank tracing an arc from west through north to east, the remnant of what was originally a circular rath roughly 56 metres in diameter. The southern half of the monument was bulldozed sometime in the 1950s, and no visible trace of it remains at ground level.

A rath is a type of ringfort, one of the most common archaeological monument types in Ireland, typically consisting of a roughly circular enclosure defined by one or more earthen banks and ditches. They were built and used primarily during the early medieval period, broadly from around 500 to 1000 AD, and served as farmsteads and enclosed settlements for farming families of varying status. The Castlelambert example, with its 56-metre diameter, would have been a reasonably substantial example of the type. What makes it quietly melancholy is the circumstance of its partial destruction. The bulldozing in the 1950s, recorded through local information rather than any formal documentation, reflects a period when agricultural improvement and land clearance frequently came at the expense of monuments that had survived for well over a thousand years. The northern arc of the bank endures, but it now defines the edge of something that no longer has a centre.