Measuring roughly 18 metres north to south and 16 metres east to west, and rising about a metre above the surrounding ground, it may be entirely natural, or it may be something that human hands once shaped and enlarged for purposes that are no longer obvious. Large angular limestone blocks lie scattered across its surface, and broad slabs are exposed along the waterline, giving it a settled, deliberate appearance that is difficult to dismiss as purely accidental geology.

Karkov and Ruffing first identified a cluster of such rock platforms here in 1990 and 1991, and the site was later described by O'Sullivan in 2004 as a possible prehistoric or medieval rock platform, one that appears to be a natural bedrock outcrop that may have been enhanced or enlarged at some point. A crannóg, an artificial or partly artificial island used as a dwelling, typically constructed from timber, stone, and brushwood in a lake or wetland, lies just 220 metres to the west at Goose Island, and a second crannóg is recorded nearby at the same island group. A mound of archaeological interest sits roughly 350 metres to the southeast within Rochfort Demesne itself. The platform would originally have stood around ten metres from the shoreline, meaning that the lake margin has shifted over time, subtly altering what was once the relationship between this feature and the open water around it. Whether the platform served as a staging point, a working area, or some kind of ancillary structure connected to the crannog settlements nearby remains unresolved, and it is that unresolved quality, the possibility hovering between natural and human, prehistoric and medieval, that gives the site its quiet interest.