Located off the coast of Yonaguni, the southern most of the Ryuku Islands in Japan, the Yonaguni monument is a huge underwater ruin, believed to be man-made, which is estimated to have been built 6000 years ago, during the last ice age. During the last ice age, the water level was much lower than it currently is, and the Ryuku Islands where actually connected to the mainland.
Stone carvings on the rocks have been found and sharp straight edges made it unlikely to have been formed naturally. People believe the structures found include the ruins of a castle, a triumphal arch, five temples, and at least one large stadium, all of which are connected by roads and water channels and are partly shielded by what could be huge retaining walls.
Excellent Scuba diving spot!!!
In the first picture you can see carvings found on one of the walls.
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what the hell, i can't go here.
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