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The ruins of the Lost World in Yonaguni are said to be about 8,000 years old!
Many
of the artifacts within the Lost World in Yonaguni are submerged ruins
that have been man-made out of solid rock slabs that stand at distinct
right angles. Although the ruins seem quite old to most, 8,000 years is
actually remarkably early for the kind of technology that had been used
to carve these ruins. There are many theories that exist about the
identities of many of these structures.
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