The Ordnance Survey maps long labelled it simply "Abbey (in Ruins)", yet nobody can say with certainty what it was. No dressed stone survives, no doorway arch, no window jamb, nothing that would let a researcher confidently assign a date or a dedication. What remains is a rectangular footprint, roughly 6.7 metres east to west and 3.1 metres north to south, with the north wall doing most of the work of holding the memory of the building together.

The structure sits in the north-eastern quadrant of what may be a wider ecclesiastical enclosure on Inis Mhic An Trír, and it is not alone. A second building, recorded on the OS maps as a "Tower in Ruins", stands in the field immediately to the east, hinting that whatever once occupied this ground was more than a single isolated chapel. The north wall, the most legible part of the ruin, is built of regularly coursed rectangular blocks with an inner and outer wall-face and a remarkably narrow rubble core of only about 12 centimetres. A small plinth, a projecting ledge of dressed masonry at the base of an exterior wall, is visible at the eastern end of that north face, one of the few details that suggests deliberate architectural intention. The east wall has been absorbed into a later field boundary, a fate common to ruins in working farmland, and the south and west walls have largely dissolved into grassed-over lines of facing-stones. Scholars Paul Gosling, and Aubrey Gwynn and R. Neville Hadcock, have noted the site in connection with early monastic activity in the region, though the absence of diagnostic features makes it impossible to pin down further. The building may be the remains of a church associated with an early monastic settlement, or it may be something else entirely; the evidence simply does not stretch that far.

The island sits on Lough Corrib, and the ruin occupies improved pastureland that slopes northward toward the water. The interior of the building is strewn with rubble, and nettles have colonised the base of the north wall. A companion ruin is visible to the east from the same field, which gives some sense of a site that once had more architectural ambition than its current state suggests.