Sorry guys i just found out it was a repost
Here's a very quick guide to get under Orgrimmar at any level. Without any mounts or special items. All it requires is a simple click and poof! You're under org
Step 1. Go to the Hall of Legends (where you buy pvp items).
Step 2. Stand here and right click the chair.
And that's it! There's a bridge here that you can walk past to explore more. Thanks everyone hope you like it :P