The Duane Purvis All-American - Some regulars order this burger with an egg on top—but we think that's going too far. After all, this 1/4-pound ground sirloin cheeseburger on toasted sesame seed bun and named for a Boilermaker football player from the 1930s already features a thick smear of creamy peanut butter. Perched on a hill leading up to the Purdue campus, this diner, named after the Indiana-made root beer, has been drawing in customers since 1929. ($7.25)

• Handicapped accessible