What is recorded here

Greenish Island holds a D-shaped cliff-edge fort at the southern tip where the Deel joins the Shannon, its earth and stone bank closing off the promontory while a larger enclosure waits eighty-five metres north. The tide gates access, the pasture hides the line, and the river confluence suggests the islet served as a watched threshold rather than a forgotten oddity.

Greenish Island is recorded as a islet in County Limerick. Its open map record supplies this location and any linked names or public references.

Greenish Island is a small islet located in the Shannon Estuary in County Limerick, Ireland. It is notable for its historical association with early 20th-century land reclamation efforts and as a site of archaeological interest, including possible medieval monastic remains.