Carrigrenan Tower is a 19th-century ornamental folly tower located on Lough Mahon shore on Little Island in Cork Harbour. Constructed as part of the grounds of the former Carrigrenan House, the tower served as a lookout or ornamental structure for the estate owners. The main house has since been demolished to make way for a modern waste water treatment plant, leaving the charming tower as a solitary reminder of the estate's former grandeur on the picturesque harbor landscape.
