Overview: Mo Mo Ghar (Columbus, Ohio) • Nora Restaurant and Bar (Dallas, Tex.) • Tacos Mariachi (Dallas, Tex.) This trip, Guy Fieri uncovers some surprising culinary discoveries. In Columbus, a hidden gem tucked away in a grocery store servin' out-of-bounds Nepalese-Tibetan specialties. Then in Dallas, a joint cookin' up lights-out dishes straight from Afghanistan. And stayin' in Dallas, a Mexican late-night spot dishin' up standout Tijuana seafood tacos and unique mole fries.