1) Alterac Isle is not a good place to visit, even if curious what that Isle far out east from Dustwallow is about. Stay away. Unless you like lvl 59 hydra's and 61 naga elites.
2) Do not put the enchanted kelp on the alter without knowing what it does first - Giants with giant spears are owy.
3) Finding Onyxia's lair @ lvl 38 is not as cool as it seems, death is all that shall come >.>