CNN Travel's 23 of the World's Best Sandwiches

"Is there a food more humble yet universally adored than the sandwich? And while one person's go-to hamburger snack might be another's katsu sando or chivito, there's hardly a country on the planet that doesn't turn to some type of bread with something stuffed inside it to cure a craving. Traveling the world's sandwiches is, in a way, like traveling the world. To help narrow your choices for the sandwich to plan your next trip around, here are 23 of the world's best sandwiches." - cnn.com