Märket is a tiny island divided by the Finnish-Swedish border. When the finns inadvertedly built a lighthouse on the wrong side of the border, the swedes agreed to trade it for an equal spot of land on the other side, causing the border to zig-zag.
The New York City owns an abandoned 22-acre island less than one mile from Manhattan. It has been abandoned since 1963 with no current plans of development.
There is an island in the English channel where cars are banned. People get around on bicycle, horses or tractors.
There is an island in Puerto Rico inhabited exclusively by a few scientists and over 800 monkeys. It is a grand experiment that is off-limits to tourists. It is called Monkey Island.
A French nuclear physicist attempted a single-handed invasion of a small island in 1990.
On a small Pacific island in 1917, the entire population of men died except one. This remaining man proclaimed himself “king”, thus beginning an orgy of rape and murder.
There’s an island in Kazakhstan/Uzbekistan that was used as a test site and is now riddled with anthrax, smallpox, plague, etc.