I was able to explore quite a bit and find some hidden datacrons. I also jumped over rocks and mountains and definitely skipped to areas I should not have been in. If you mean like being able to swim around continents like in WoW then I have not seen that yet. Some of this is just the difference between playing on different planets for zones and playing on two continents where everything is mapped out. Still, there are lots of neat side areas with elite mobs that drop rare items, datacrons, gathering areas, heroic quests, etc. I played Rift a large amount and this game has just as much room to explore as Rift did. You can jump over mountains and such just like in Rift - at least I certainly did. Can you skip entire zones? Not that I have seen, but again this comes down to design (planet vs. arbitrary borders on zones).