Yonaguni Monument: A Natural Formation or Submerged Ruins?

Yonaguni Monument: A Natural Formation or Submerged Ruins?

Direct Answer: What Is the Yonaguni Monument, and Is It Built or Born? The Yonaguni Monument is a submerged sandstone formation off the southern coast of Yonaguni-jima in Japan’s Ryukyu chain, discovered by sport diver Kihachiro Aratake in 1986. Marine geologist Masaaki Kimura argues it is a worked human structure roughly 10,000 years old; geologist […]