 Ancient protected structures, as recorded on the Record of Monuments and Places, include examples of fulacht fiadh, middens, corn-drying kilns, the remains of a medieval church and graveyard, and the 15th or 16th century tower house known locally as Wallingstown Castle.A number of Cork's pharmaceutical companies are based on the island.The main drainage wastewater treatment plant for Cork City was also opened in the area in 2004.