I'm sure alot of you have noticed the one un-clickable zone north of the plaguelands. This area, including the old Quel'thalas on the shore with the white buildings, are now covered with an invisible wall. This video is an exploration of that area, plus a look inside an uninstanced version of Stratholme.

Music;
ZOX- Canon

Have fun! This exploit is easy to do, so check it out for yourselves.