Turtle Island is an island of Bermuda.
Map of Turtle Island, Bermuda
Turtle Island, off a shore in Bermuda, appears to be the home of one of the residents in Bermuda, NE of the Devil's Hole. The Devil's Hole is a small dock, located on the island of Bermuda. The island has a house, with a boat just off shore, but does not seem to have any road ways, nor land connected to it. The location of this island is 32.322517,-64.71539 and may be found on Google Earth for imaging. As of now, there seems to be no further information on this mysterious, little island.
References
Turtle Island, Bermuda Wikipedia(Text) CC BY-SA