Today is the ULTIMATE “Taco Tuesday.” Happy National Taco Day!. To celebrate National Taco Day, Yelp has released a list of the best taco joints in all 50 states. Here in Iowa, the winner is Flame The Taqueria in Johnston! Flame the Taqueria’s main location is at 5765 Merle Hay Road, but there is also a restaurant at 103 Main St SE in Bondurant, Flame Cantina in Ankeny, and a food truck that travels around the area.