Or rather, it may still be there, just no longer visible, swallowed gradually by rising lake levels over the course of nearly two centuries. The lough sits on a bog-covered upland plateau, hemmed to the south by forestry, and it holds what might be one of Ireland's more quietly puzzling archaeological uncertainties.

The 1837 edition of the Ordnance Survey six-inch map clearly shows an oval-shaped island in the western half of the lake, measuring roughly 25 metres east to west and 15 metres north to south. A townland boundary was recorded as running through its western edge, which suggests the island was considered solid and significant enough to feature in administrative geography. On that basis, it was listed in the Record of Monuments and Places in 1995 as a possible crannog, a term for an artificial or partly artificial island, typically constructed during the early medieval period as a defended dwelling place, built up from timber, stone, peat, and brushwood in shallow lake water. The qualifier "possible" matters here: no excavation has confirmed the site, and later map editions show no island at all in the same location. The most likely explanation is straightforward if melancholy; water levels in the lough have risen since 1837, submerging whatever lay there beneath the surface.