The Plaza de la Constitución, known as "El Zócalo", is one of the most visited tourist spots in the capital of Mexico. It is located in the heart of the Historic Center of Mexico City. You have all the information in: «The FMM to travel to Mexico: what it is, where to get it and how to pay for it«.
You have all the information in: "The FMM to travel to Mexico: what it is, where to get it and how to pay for it".