Abandoned concrete-island former coal-mining city off Nagasaki, Japan. Inspired the Skyfall Bond villain lair. UNESCO-listed.
From Wikipedia
Hashima Island , commonly called Gunkanjima , is an abandoned island about 15 kilometres from the centre of Nagasaki, Japan. It is one of 505 uninhabited islands in Nagasaki Prefecture. The island's most notable features are its abandoned concrete buildings, undisturbed except by nature, and the surrounding seawall. While the island is a symbol of the rapid industrialisation of Japan, it is also a reminder of Japanese war crimes as a site of forced labour prior to and during World War II.