So I searched for this on the forums but couldn't find anything so as far as i'm aware, this hasn't been posted.
On the Darkmoon Island there are 3 tents all of which are under construction and you're unable to get into them. However, by walking up to the barrier and using the druid talent 'Displacer Beast' I was able to go through the barrier and end up on the other side. Each room is empty but they're nice and cosy :P.
If you need a demonstration you can see it being done in this video here Avy Explores Ep1 - YouTube
Would be nice to know if you can do it with other teleportation abilities too, but I just don't have the classes to test it out on.