Teotihuacán, Mexico

Teotihuacán is an ancient Mesoamerican city located in the Valley of Teotihuacán, in the State of Mexico, about 40 kilometers northeast of modern-day Mexico City. The site is one of the largest and most influential cities in the pre-Columbian Americas, with a rich history dating back to around 100 AD. Teotihuacán was a major urban center, covering an area of approximately 20 square kilometers.

The city is renowned for its impressive architectural achievements, including the Pyramid of the Sun, the Pyramid of the Moon, and the Temple of Quetzalcoatl. These structures demonstrate advanced engineering and construction skills, with precise alignments and orientations towards celestial bodies. The pyramids are among the largest in the world, with the Pyramid of the Sun being the largest, standing at over 75 meters tall.

Teotihuacán was a significant cultural and economic hub, with a complex system of social hierarchy, trade networks, and artistic expression. The city's artisans produced intricate murals, pottery, and jewelry, showcasing their advanced craftsmanship. The site also features a sophisticated system of roads, canals, and aqueducts, which supported a large population.

The city declined in the 8th century AD, and its exact history and the identity of its rulers remain unclear. Teotihuacán was designated a UNESCO World Heritage site in 1987, recognizing its cultural and historical significance. Today, it is one of Mexico's most popular tourist destinations and a significant archaeological site.