Centro Histórico, is one of the heritage quarters of Mexico City, surrounded by some of the finest architecture that is to be found in the city. The Zócalo or the Plaza de la Constitución is one of the largest open spaces in this area. Famous buildings include the Palacio Nacional and the Catedral Metropolitana. It is the perfect place to visit for those looking to soak in some old-world Mexican culture. The best time to visit the Centro Histórico is during the Festival del Centro Histórico. Guided tours are also available.