5. Hashima Island, Japan

Known as Gunkanjima or Battleship Island, Hashima Island once thrived as a coal-mining powerhouse off the coast of Nagasaki. The island’s dense, concrete apartment blocks once housed thousands of workers, emblematic of Japan’s rapid industrialization. When the coal ran out in the 1970s, Hashima was swiftly abandoned, leaving behind a stark, fortress-like silhouette. Its haunting ruins now stand as a stark reminder of both progress and decline—a unique symbol in Japan’s modern history. Read further