The new starting zone for the Pandaren in World of Warcraft: Mist sof Pandaria is The Wandering Isle, which is actually on the back of a Pandaren Turtle! The turtle left Pandaria 10,000 years ago and has since grown to be so large its entire back is inhabitable!
Here is the Concept Art of the Wandering Isle:
Here is the map of the Wandering Isle:
Here is an in-game screenshot of the Wandering Isle: