Phantom islands are islands that are believed to exist and appear on maps for a period of time (sometimes centuries), and they are removed after they are proven not to exist (or the general population stops believing that they exist).
... Islip is located at 40°43'55" North, 73°11'6" West (40.731938, -73.185135)1.
According to the United States Census Bureau, the town has a total area of 11.3 ...