【World Heritage Site】Gunkanjima, the Ruins of an Island Gunkanjima was once a prosperous undersea coal mine that supported Japan's modernization. At its peak, more than 5,000 people lived on the island, but the mine was closed in 1974 due to the energy revolution, after which the island became uninhabited. It is a 40-minute boat ride from Nagasaki Port, and on a guided tour of the island you can see the fascinating ruins up close while hearing about the lives of the islanders. 🚢 👩🏻‍💻 Save th