http://www.youtube.com/watch?v=UJYcedL_Wss
Well my friend showed me this little trick in game a few months ago and I just decided I would share. I am not sure if anybody has done this before but if they have sorry for posting it again.
Ok so I recorded myself getting under Ogrimmar, it is pretty choppy because I used my old computer with insufficient CPU speed
you should get the idea though
when under the city you can pretty much run around the entire area of the city its just sort of an undeveloped area and sometimes you can see people inside and outside of ogrimmar.
Oh yeah and you can go around on those wooden step things on the wall if you are careful but i couldnt get anywhere else so I decided to not even try in the video (maybe someone will find something cool to do over there lol)
I almost forgot, when you jump off the wall you lose a little over 1700 hp, so make sure you have enough health (most higher levels do) or use naggonfogger/slow fall.
http://www.youtube.com/watch?v=UJYcedL_Wss