It's dangerous
The Parrots are looking out for you
Hades
The bottom of the planes... the frozen end.
Elysium
The first moments of the game
Tartarus's Mines
Tartarus is not only home to lava and the like but you might find a mine or two there too
The Wastes
Home of witches and lots of evil... this frozen swamp is packed with monsters.
Limbo
Limbo is an unusual place. filled with the lost, the waiting and the things they held on to before death.