Level 1 to 10: Field of Bone
Level 10 to 20: Kurn's Tower
Level 20 to 25: South Karana
Level 25 to 30: Lake of Ill Omen
Level 30 to 35: Frontier Mountains
Level 35 to 40: The Overthere
Level 40 to 47: City of Mist
Level 47 to 50: Karnor's Castle
Level 50 to 55: Chardok
Level 55 to 56: Temple of Droga
Level 56 to 62: Plane of Innovation
Level 62 to 65: Halls of Honor
... Break at level 65 for AA's: 479 AA's (as of 25 Feb 2009)