Guy Fieri travels in search of one-of-a-kind joints serving one-of-a-kind food. The truly unique include a local legend in Massachusetts where people line up for whole belly clams, a Michigan joint that serves so many chicken gizzards they named the place Gizzard City, an old-time American diner in downtown San Francisco serving up Portuguese specialties and a lunch truck on the side of the road serving homemade authentic Mexican food.