In my world, there all sorts of places that I'd like to include in my book but I have yet to find sound reasons to include more a handful of them.
How can I connect several distinct locations to my plot?
What type of constraints should I keep in mind while doing so? (I'm shooting for ~100k word count)
Note: I have been intentionally vague about the details of my plot, characters and world because I'm looking for over-arching, reusable mechanics rather than specific fixes for my book.