5. Atlantis
There have been claims of Atlantis evidence discovered in Greece, the Bahamas, Cuba, and Japan, among other places. However, no one has been able to pinpoint its precise location despite much investigation and study. Ancient historian Plato originally told the tale of Atlantis more than 2,000 years ago. According to what he said, a terrible occurrence some 10,000 years ago caused a powerful civilization to vanish underwater. Historians and scientists continue to disagree over its possible location and the potential discoveries that might result from its discovery.