4. Triple D Nation: Hearty Helpings

On this trip, Guy Fieri's plate is full of hearty, heaping helpings. First up, he stops by a neighborhood joint in Pittsburgh that's still servin' local staples and family favorites. Then, a Florida diner with inspiration from up North is spreading out all over the South, and in Oklahoma, the second generation is churning out award-winning chili on all kinds of creations.