A coal mining island which was abandoned in 1974. Islands, Abandoned, Military - Historic - Forts and Batteries, Military - Historic - Closed Facility Links: en.wikipedia.org By: kaiken
http://www.artificialowl.net/2008/08/hashima-island-or-gunkanjima-nagasaki.html
There are plenty of pictures pages, here's one more:
http://www.viceland.com/wp/2009/04/battleship-island-japans-rotting-metropolis/
http://www.theatlanticcities.com/neighborhoods/2012/04/welcome-most-desolate-place-earth-gunkanjima-aka-battleship-island/1696/