It seems backward, but I've physically visited almost twice as many U.S. states as I’ve visited through books -- 43 in body versus 24 in mind. (Maybe it's a dearth of books set in certain states ... "they say" it takes extraordinary content to overcome a flyover-country setting.)
My international travels are more parallel in number, although the literary locales have been markedly more exotic.
I’m shocked by the amount of white space on these maps! To remedy that, I'd love to hear recommendations for books (fiction or nonfiction) that explore the planet.