Secret Marvels of the World:
360 Extraordinary Places You Never Knew Existed and Where to Find Them
   
by Lonely Planet

The sort of book you put in the john so you can read a few pages when you need to contemplate. Fun flipping through the pages and the short articles about each place are well written and entertaining. But unless you're preparing to do some world traveling, or at least traveling to Hawaii, not a necessity.