
Yonaguni Monument: A 25-Metre-Deep Underwater Enigma Near Japan's Westernmost Island
The Yonaguni Monument is a massive underwater rock formation off Japan's westernmost island, measuring 25 metres tall and 100 metres long. Its stepped, pillar-like structure sparks debate between scientists who view it as a natural geological feature and those who argue it is a remnant of a 5,000-year-old sunken city. Accessible only to experienced divers due to strong currents, the site remains a focal point for tourism and geological research.












