It measures roughly fifteen metres north to south and nineteen metres east to west, rising only about forty-five centimetres above the surrounding rushy, marshy terrain. Large limestone blocks, some up to a metre in length, lie scattered across its surface and appear to form a rough kerb around its edges, most clearly along the northern side facing the water. Whether any of this is the work of human hands, or simply a quirk of the landscape, remains an open question.

The site is classified as a possible crannog, which is the term for an artificial or semi-artificial island dwelling, typically constructed in lakes or wetlands during the early medieval period in Ireland. They were built up using timber, stone, peat, and brushwood, and served as defensible homesteads for farming families or local lords. The uncertainty here is genuine and not merely cautious phrasing. Aidan O'Sullivan, who examined the site and published his observations in 2004, noted that the connecting spit of ground could be a deliberately constructed causeway of the kind sometimes associated with crannog access, but might equally be a natural landform. He also recorded several other low oval mounds along the same shoreline, including one approximately forty metres to the east, which complicates any straightforward reading of the site as an isolated artificial construction. The presence of a possible limestone kerb offers one of the stronger hints of human shaping, but it falls well short of confirmation.