El Califa de León, a humble taco shop in Mexico City measuring just three square meters, has become the smallest restaurant in history to receive a Michelin star. This remarkable achievement marks the first time a taco shop has been recognized by the prestigious guide. Located in the heart of Mexico City, El Califa de León has been serving up mouthwatering beef tacos for over 20 years. With only four items on the menu, chef Arturo Rivera Martínez has consistently relied on the quality of his ingredients. Despite its tiny size and high prices ($5 per taco), El Califa de León attracts a loyal following, including Mexico City natives and politicians.