Plaza de la Constitución, or the Zócalo, is Mexico City’s historic core, one of the world’s largest public squares at ~57,600 sqm. Once the ceremonial heart of Aztec Tenochtitlán, it’s now surrounded by the Metropolitan Cathedral, National Palace, and colonial buildings. The Zócalo hosts vibrant events like Independence Day’s Grito de Dolores, festivals, and protests. A massive Mexican flag is raised daily, with street vendors and performers adding energy, especially during Day of the Dead or Christmas markets. Nearby Templo Mayor ruins connect to Aztec roots. A quick 30-60 min stop, longer with nearby sites, it blends history and culture.

Mercado de San Juan, officially Mercado Ernesto Pugibet, is Mexico City's oldest and most exotic gourmet market, built in 1955 on the site of a former cigar warehouse in the historic Centro neighborhood. Spanning two buildings a block apart, it specializes in rare imports and global flavors, drawing chefs and foodies for European cheeses, cured meats (like jamón ibérico), Asian produce (bok choy), and exotic meats such as crocodile, wild boar, venison, and iguana. Stalls brim with fresh seafood, edible insects (chapulines), and hard-to-find fruits. The bustling vibe includes family-run spots, and lots of places to eat amazing fresh cooked food, offering a sensory feast of culinary diversity.