A decades-old favorite for thinly sliced roast beef piled high on soft onion buns, Arby's has diversified its menu to include new treats like Chicken Cordon Bleu sandwiches and strawberry banana split shakes. But perhaps it will always be the seasoned curly fries that keep people coming back for more. Be sure to grab a packet of "horsey sauce" for a little extra giddy-up.