From a distance, everything appears normal at The Sludgeworks:
![Image](http://i12.photobucket.com/albums/a233/itsukitachibana/Screenies/WoWScrnShot_092911_211701.jpg)
But get up close, and....
![Image](http://i12.photobucket.com/albums/a233/itsukitachibana/Screenies/WoWScrnShot_092911_211730.jpg)
Yes, that's a wall. You can fly 'into' it in some areas, like soft spots, but you can't get through. And you'll get caught and have to back out if you do find a 'soft spot'.