tucson: I am gojng to Phoenix for 8 days for vacation as I always do In June. (Actually Scottsdale) and was wondering where the best mexican restaurants are, Because i will be headed to Tucson as well, thks for the feedback!!!|||Phoenix: Juan's Authentic Mexican Food, it's a family owned restaurant and features truly authentic Mexican food. And if you don't believe me, just check out their reviews! Tucson: Nico's Mexican Food for authentic food and drinks. It's a chain restaurant and it's open 24 hours. Enjoy Arizona!!