1. Teotihuacan is an ancient Mesoamerican city located in the Basin of Mexico, which dates back to about 150 BCE. It is said to have been the largest city in the pre-Columbian Americas, with a population estimated to have been over 100,000 people. The city’s name means \"the place where the gods were created,\" and it is home to numerous pyramids, temples, palaces, and other impressive structures which are believed to have been used for religious, political, and social gatherings. The most famous structures in Teotihuacan are the Pyramid of the Sun and the Pyramid of the Moon, which are both located along the city’s central avenue, known as the Avenue of the Dead.

2. The archaeological site of Teotihuacan is generally open daily from 9:00am to 5:00pm. Their phone number is +52 594 956 0205.

3. Tickets to Teotihuacan can be purchased at the site’s entrance gate. As of 2021, the general admission fee is 85 Mexican pesos (about $4 USD). Guided tours are also available, and vary in price depending on the length and level of detail included. Bus and shuttle services are available from Mexico City to Teotihuacan, or visitors can choose to drive or take a taxi. It is about a one-hour drive outside of Mexico City.