This is a bug how to come under orgrimmar. 1. Orgrimmar
You need to have Ghostwolf, Traveler form or mount. First you go to Valley of Honor, so go up to the hunter trainer. When you go up, there is a stone wall, jump on it, so you staying on it. So walk to the Sharp "Stick" and go how long you can out on it. So at the wall to "The Drag" you seen a half building .. so try jump over to it(rogues sprint DOE'SNT! works). SO you are on the house, you see the tree wall, (dismount if you use mount), now jump over the wall. It's can take alot of time to do this, but it's works. (you need to get alot of hp before jumping over the sticky wall, cuz it's do alot of dmg when you jump down.) now you are under orgrimmar. There is alot of bugs there. But if you want to come out you have to go on the "Ground" (It's likes durotar) and just going front. So you come to the orgrimmar front wall (But you seing backward from, and it's bugged), so go trough it and so you are in durotar..
I know this is a old bug, but it's still works xD
My friend know how to come under RFK, but it's difficult to tell.. If you want to know more out char's is Horde Me (Uloup) and my friend's (Shynooby) on laughing skull, i'am lvl 47.. he's lvl 29 xD