Ever since the humankind found out about Atlantis, we've been trying to find any traces of this impressive underwater civilization. And while the search is going on, fancy joining me on a trip to a few historic underwater sites? Let's see what we can find out about ancient civilizations! The first one on our list is what is being called the underwater Stonehenge. Next, we're taking you on a tour of the Ryukyu Islands, just off the coast of Japan.

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