Hyperborea was a space island in the North pole sky. Bigger than the Moon.
Atlas failed to take off a gigantic spaceship : its fall in the Atlantic ocean causes the flood
Atlantis is an island spaceship, while Hyperborea is a mother spaceship
Somewhere in the Pacific waters lies the mysterious Mu, not to be taken for Lemuria
Archaeological discoveries Yonaguni revive the hypothesis of sunken continent Mu according to Churchward