Cultures all across world have each had their own creation myth or at least their own version of the creation myth. When doing any type of an in depth study of multiple creation myths, it is clear that each myth seems (in some sense) to be telling the the same story.
There was nothing, only a god or gods. The god(s) spoke and created...everything in an orderly manner. Out of nothing, came something and it was good, but good could not last forever. Light, firmament, earth, separation of waters, man and women. They were created the same and yet separate. Man became wicked and the god(s) sent a flood to destroy the world, one man was kept safe.
These are few of the similarities shared between numerous creation stories, stories that have been passed down for generations. Many scholars who study the creation myths do not yet believe that the vast similarities between stories either proves or teaches anything about their origin. With so many common attributes, however, it is more likely that all of these myths were once the same; changing over time and adapting to fit the cultural differences, as humanity developed and spread across the earth.
Such a conception of origin gives way to prove and emulate the story of The Tower of Babel (Geneis 11:1-9); in which God, after seeing mankind's pride and ability to create something so great, went down to earth to confuse the languages of the people and scatter them across the earth.
Here are some quick links to different creation myths (Most of these link to a college website and are very reliable):