While I was bored in dalaran I was chugging underbelly elixirs until I got the wasp buff. If you hug the the top of the invisible walls with pipes on them you can fly over the wall and into the water allowing you to go under dalaran and into the various closed off mobs. Notice the mini-map on the 3rd SS that is the only one that can take you under without forcing you to lose your wasp
If your wondering what I mean about "invisible walls" go down the ramp to the underbelly either on the right or left of you will be a few pipes coming out of the wall. There ya go
Step 1 Find Underbelly Elixir
Step 2 Use Underbelly Elixir until you get the wasp
Step 3 Find the northeastern most set of pipes in the underbelly
Step 4 Hug the invisible wall and fly up
Step 5 Fly under the ramp
Step 6 Fly over the invisible wall
Step 7 fly down/east
Note: You may get the "No flying zone in dalaran" debuff. So be quick