This isn't very useful but it does involve an exploit.
Normally when you try to enter the Horde side of the city, you get teleported back to the entrance. I found a way to bypass that. I tried flying into the building thinking the method I used wasn't needed but, flying into the building doesn't work at all. There is only 1 entrance at the front.
Map View
Attachment 5745
Inside View
Attachment 5746