Decided to see if memory served. It does, this link in addition to having a lot of archeological info, also has a recent map of restored area. Layout just as I remember, except the bus came in at the Museum behind the Pryamid of the Sun. The large plateau was the foundation for the Temple of Coatzcoatl and much larger in area and probably in volume of the major pyramids.
http://www.philipcoppens.com/orionimage.html
I think it was also the site of the decisive “battle” during Cortez’ desperate flight from Tenochtitlan to Vera Cruz.