Ghost Island.

This remarkable place was just featured on the daily news today: Hashima, a tiny island off the coast of nagasaki. it is fairly well documented in wikipedia.
i encourage read on about it. this island apparently used to be the most densely populated place on the world with what extends to 83,476.2 inhabitants per square kilometer. it also features the first concrete apartment building of japan. i am kind of tempted to go there for a visit as i havent been to the western part of kyushu yet...