you can use the crashin' trashin racer to explore many normally unreachable areas.
Crashin' Thrashin' Racer Controller - Item - World of Warcraft
Just summon it near the well with the portal to the sewers and jump in it with the robot. it wont be teleported and u can use "1" to charge to the wall and reach many places, for example the croc.
just watch so u dont get too far away because then the bot will despawn.
1.Summon bot near well portal in dalaran.
2.jump in to the well.
3: press "1" and charge trough the wall
4:
Sry no pics, just did this fast on another computer wich doesnt have wow installed.