In Altoona, Pennsylvania, they serve pizza in squares with each portion holding a slice of salami and a square of American cheese. St. Louis pizza is made on unleavened bread and topped with Provel cheese instead of mozzarella. Colorado's giant pizzas are sweetened with honey. We hear a lot about New York style and Chicago style pizzas, but many places have their own pizza traditions, which you might think are weird or which you might want to plan a road trip around. Each style has a story behind it, even if that story is lost to time. Check out six different pizza styles that go against the grain of the chains, and where to get them, at Atlas Obscura.