The good people at Serious Eats have put together a thorough guide to all of the sandwiches of the world (so big it's split into two editions: American and International). There are beautiful sandwich-porn photos and a fascinating rundown of the international language of stuff-between-two-slices-of-bread. For example, did you know that South Africans favor a variation on the submarine called the Gatsby that often features French fries? Now you do.