Several years ago, near the city’s main plaza, the Zocolo, and its cathedral, a buried Mayan city was discovered as a new subway line was being excavated. Today, the newish visitor site continues to be excavated and a fantastic museum displays some of the discovered artifacts. The Templo Mayor Museum brings the Mexicas (the word used to describe the indigenous cultures) to life.
You can still see some of these things at the amazing anthropology museum in Mexico City’s Chapultepec park or at the pyramids outside Mexico City at Teotihuacan. This newer museum offers an alternative right in the center of the city!