Between 1885 and the late 1930s, the Riverside Hospital was one of the places operating in the USA for patients suffering from quarantinable diseases such as smallpox, typhoid fever, scarlet fever and leprosy. Until the hospital was closed in 1963, the island served as a drug rehabilitation center for heroin addicts. It is now an uninhabited bird sanctuary. The building of the hospital is still there, although it’s in danger of collapse, with its windows all broken and paint peeled off the walls.