So I was bored and had allready tried to fly to the edge of the world before but I wasnt as far as I could to one side of Northrend.
I went under Northrend and flew around some places as you can see in a sec, then I flew under The Nexus area and flew as far as I could while being underground so I dont get dismounted.
I allmost made it to the edge of the map before I died but I fell and the screen kept moving forward so this is what it looks like.
As far as I got flying.
After dying.
Once I hit the edge of the map while falling dead it started freaking out and camera went throught the ground, water, and up above the water.
And of course to be annoying as hell I have to take a spirit rez in the Barrens where I spawned as a ghost.
Here was my exploration before I did all that, was just for fun.
Thanks, buncha useless stuff to show people, have fun!