Nonsuch Island (originally Nonesuch Island) is part of the chain which makes up Bermuda. It is in St George's Parish , in the northeast of Bermuda. It is 5.7 ha (14 acres) in area and is at the east entrance to Castle Harbour, close to the south-easternmost point of Cooper's Island (now ostensibly part of the much larger St David's Island). Latitude (DMS): 32° 20' 52 N Longitude (DMS): 64° 39' 48 W
In 1865 it served as a yellow fever quarantine hospital. On the eastern part of the island there still remains a small cemetery. In 1930 it served as a base for William Beebe and Otis Barton's landmark bathysphere dive.
The island is a wildlife sanctuary. It is wooded and with a small freshwater marsh, access to the public is strictly limited. The restoration of the once barren island into a 'Living Museum of pre-colonial Bermuda' is the lifetime work of now retired Bermudian ornithologist and conservationist David B. Wingate, and part of his effort to bring back from near-extinction the once plentiful endemic nocturnal seabird, and national emblem of Bermuda, the cahow. This project involves the reintroduction of other species, notably the West Indian topshell and the yellow-crowned night heron.