Cuicuilco
Cuicuilco is the site of the first large-scale ceremonial center in the Mexican Plateau and one of oldest of any size in the Americas, with occupation starting around 1000 BCE. Cuicuilco means “place of hieroglyphics” in Nahuatl. The most important structure of the site is the Gran Basamento Circular or “Great Circular Base” which has characteristics typical for the Pre-Classic period in Mesoamerican chronology (800BCE to 150AC). There are two access ramps on the east and west sides aligned with the sun on the equinoxes. Today, still on these days, many visitors come dressed in white. Eruptions from the nearby Xitle volcanos destroyed the center and its population relocating to other parts of the Valley of Mexico. These same eruptions covered much of the south of the Valley of Mexico, created the rock bed known as the Pedregales del Sur, which cover parts of Tlalpan. There is a site museum which features small anthropomorphic figures.
Read more about this topic: Tlalpan