Forever Yogurt, Chicago

When Forever Yogurt claims that it has “literally trillions of possibilities” for combining frozen-yogurt flavors and toppings, it is literally not kidding. At each location, some 16 flavors and 40 toppings challenge self-serve artists to twirl, sprinkle, and festoon cups of fro-yo to their own taste buds' content. Frozen masterpieces can accommodate preferences for low-fat, nonfat, nondairy, and no-sugar-added diets, as well as daily food-pyramid requirements for fresh blueberries, kiwi, and caramel-turtle cups.