Abandoned Smallpox Hospital, Roosevelt Island, New York

This institution was opened in 1856 to care for New York City's unfortunate and destitute. The island sits between Queens and Manhattan, and was easily accessible by ferry; it was home to a prison, insane asylum, and other similar facilities. As of 1872, an annual number of 7,000 patients were treated, with an average of 450 deaths. Was abandoned in the 50s.