The World itself will be huge, and it will not contain zones so there will be no loading time between each location ( the scenery streams constantly from the hard drive and server) giving you the feeling that the world never ends. Each location in WoW will be different and contains unique characteristics. There is the cold, snowy mountains of Dun Morogh right to the Hot, humid Jungle of Stranglethorne. Also, each location will contain its own variety of dangerous creeps who will prey upon the unaware, so you better keep your guard up at all times.