Hayward's industrial corridor once attracted working-class people from across the East Bay, and World's Fare Donuts harkens back to that time. At this joint, the donuts are plentiful and big. If you're trying to save money and want to spread the greatness of this donut across the entire day, get the butterfly cinnamon roll. It's basically two buns merged into one. Its secret: not only are the buns slathered with cinnamon and sugar on the outside, but the cinnamon also makes a notable appearance inside the dough, which is soft and creamy and crispy on the outside, just as every baked good worth its weight should be.