The latest trailer for The Legend of Zelda: Spirit Tracks, featuring what appears to be the game's introduction, highlights what is certain to be one of the most bemoaned features of the new game: the Tower of Spirits. Yes, like Phantom Hourglass, this game has a central dungeon area to which you'll return throughout the game, though players will be able to skip areas they have already completed this time.
The trailer also seems to suggest that all the train tracks are magical shackles placed on the ground to imprison an evil presence. So that's why there are train tracks around! We would have guessed "interstate commerce."