7: The Yonaguni Monument
Off the coast of Yonaguni Island, the southernmost of Japan’s Ryuku Islands, just east of Taiwan, there is a mysterious structure to be found under water. Discovered in 1987, it is unclear yet, if the Monument is an artificial or natural formation. For the purpose of a mysterious archeological adventure game, it would be of course a given to have the monument be the remnants of some ancient, long lost civilization. Maybe even connected to other mysteries of the Pacific, like Nan Mandol or Yamatai.
