But the details, like the serpent could talk and, apparently could walk, make the story sound like nothing more than myth. So, why take any of it literally? But I do believe it is much more powerful of a story if it is taken literally. But taken as history?
There's a lot of details in the "history" that don't sound like they could have possibly really happened... except for those people that do take the whole Bible literally. For example... the parting of the seas, a walking stick, or staff, turning into a snake, Elijah being carried off into the sky in a fiery chariot. Mythical, fictional, with some kind of spiritual and moral message sounds more likely to me.
But believe as much or as little of it as you want. I'm sure it has lots of meaning and importance for your life.