In the blue waters off the coast of Nagasaki lies an eerie concrete island that looks like something out of a dystopian movie. Hashima Island—also known as Gunkanjima, or “Battleship Island”—was once one of Earth’s most densely populated places. Today, it’s an abandoned ghost town. A City on a Rock Hashima’s story began in the late 1800s, when Mitsubishi bought …
