The site at Glenbane is the kind of place archaeology notices only obliquely: it was an aerial photograph, catalogued as GB89.AB.26, that first revealed a cropmark, the ghost of an older curvilinear enclosure traced by a fosse, a ditch dug to define or defend a boundary, visible from the air as a subtle difference in how crops grow over disturbed ground. What stands at ground level is considerably harder to read.

The enclosure measures roughly 30 metres north to south and 40 metres east to west. Its straight north-western side follows a natural ridge, about half a metre high and ten metres wide, which the builders appear to have incorporated into their design rather than constructed themselves. The remaining circuit is formed by a low, wide bank, now so thoroughly levelled in places that its interior and exterior faces barely differ in height by more than a few centimetres. A possible entrance, about four metres wide, survives in the southern quadrant. Another enclosure of the same general type lies approximately 200 metres to the north-east, suggesting this stretch of river plain may once have held a loose cluster of enclosed settlement or agricultural sites. The River Suir itself runs just 20 metres to the north-west, which would have made the location attractive for the same reasons flood plains have always drawn people: fertile, reclaimed ground close to fresh water.

The bank is, by any measure, subtle. In places it is genuinely difficult to distinguish from the natural undulation of a reclaimed field. The site is under private pasture, and there is no formal access or visitor infrastructure. Its interest lies less in what can be seen on a given afternoon than in what the aerial record has preserved: the suggestion of an older, perhaps more complete enclosure beneath the one that remains, and the quiet possibility that this unassuming field holds several layers of use, each one nudging the evidence of the last a little further towards invisibility.