10 Ancient Mysterious Underwater Cities

Whether one calls it Thonis or Heracleion, experts say that this underwater city is one of the oldest cities known to man. Over the years it has become the subject or setting of many different legends. One such legend claims that the god Hercules was named Heracleion because of Hercules’ visit to the city.
Helen of Troy also was said to have visited the city. Founded some time in the 8th Century BC, it once played an important religious role because it was here that the temple of Amun was built. Natural catastrophes are blamed for its submersion.
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