Why isn't Long Island considered an island?
Why isn't Long Island considered an island? To summarize, Long Island is legally considered to be an extension of the New York State mainland because it's not that far from the mainland and because its geographic features help to form important bays, which are crucial for commerce and water traffic.
What is the island that never existed?
Sandy Island (sometimes labelled in French Île de Sable, and in Spanish Isla Arenosa) is a non-existent island that was charted for over a century as being located near the French territory of New Caledonia between the Chesterfield Islands and Nereus Reef in the eastern Coral Sea.