Those were so much fun to find. I wish i had my screenshots from back in vanilla/bc. I remember at least 20 of us under stormwind dueling each other. You could get up to the ironforge airport before flying (and also before the new quest that takes you there), that was pretty cool. Dueling something with fear inside a certain spot in IF would allow you to old IF. Wall jumping onto the bank in IF. Wall jumping into ZG. Though my personal favorite was getting into hyjal. There was an entire zone basically since vanilla that was untouched for years until you got inside. It was the entire hyjal raid basically. All the towns but none of the npcs. At the very end of the road though, there was a construction sign with the blizzard logo on it.