Questing Areas Edit
Just outside Katherine Gorge/Nitmiluk Path is an area with lots of Wasps and Caterpillars. It's right where NPC Katherine is. This is a good place to grind (kill the bugs) if you are in the mid-130s and trying to get to level 137 so you can start doing Katherine Gorge and Prankster. See Wasp Area.
Right outside Raging Vortex/Kratos' Maw is an area with lots of Alpacas and Fairies (level 148+). Every MMO should have an area with Alpacas and Fairies! ;-). It's right where NPC Selena is. This is a good place to grind. It's even a Shadow Dungeon area, so you can stand there with Auto-Battle on and go afk. Selena also has resettable quests here. See Fairy and Alpaca Area.
See pages for sub-ares for quests in those areas.