Casey Webb's edible expedition takes him to Portland, Maine, for a lobster-topped cheeseburger and a potato-donut-cannoli mashup. At Margaritas Mexican Restaurant, he takes on the Taco Gigante Challenge: a foot-long hard taco packed with ground beef, chicken and carnitas.

Casey Webb's appetizing adventure lands him in Washington, D.C., for shepherd's pie at a political culinary institution, a Korean fried masterpiece and Hamilton's second-most-famous duel -- a challenge consisting of more than 3 pounds of burger and fries.