At Lismaghera in the townland of Kilglass, County Galway, what was once a clearly defined subcircular enclosure, roughly 36 metres north to south and 32 metres east to west, now survives only as a very faint scarp tracing an arc from the south-west through north to the south-east. The ground is level, the monument is gone, and the absence itself has become the thing worth noting.

The enclosure was recorded on the third edition of the Ordnance Survey six-inch map in 1915, at which point it was evidently still a legible feature of the landscape. An enclosure of this type would typically have been a roughly circular earthwork defined by a bank and ditch, the kind of enclosure associated in Ireland with early medieval farmsteads, though the function of any given example can rarely be assumed without excavation. According to local information gathered before the inventory was published, the monument was levelled in 1981. That date is precise enough to be striking. It places the destruction not in some distant era of agricultural improvement but well within the period when such sites were already known to be protected under Irish law. Associated with the site is a record for a cash burial ground, designated GA061-096001, a category that often indicates early ecclesiastical or community use of an area across a long span of time.

Very little remains to see on the ground today, and a visitor making the journey specifically to find the enclosure would likely come away disappointed. The faint scarp is the kind of feature that requires both knowledge of what to look for and favourable light conditions, typically a low sun in the early morning or late afternoon, to read at all. The real interest here is less the site itself than what its disappearance represents: a specific, dateable loss of an ancient landscape feature in a county where such monuments were once abundant.