All of the game takes place in TMK. XD I think you mean Toad Town. ;P
I'd wanna go to Toad Town (which actually includes Mario's House, BTW), the Shiver Region (Shiver City, Starborn Valley, Crystal Palace and the like), and Star Haven. Oh yeah, and Lavalava Island.
Okay, that's a lot of places... Oh well. I love that game. XD
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Deep inside us all is a little green elf telling us to burn things.