Mysterious underwater structure: Yonaguni Monument

With over 70 percent of the planet being covered by water, across the millennia some man-made structures have been have been claimed by nature. An example, the Yonaguni Monument. Commonly referred as the “Yonaguni (Island) Submarine Ruins”, the structure was discovered in the mid-80s near the Yonaguni Island of Japan. It presents itself as a […]