Today we are at the Quetzalcoatl Pyramid in Teotihuacan, just outside of Mexico City in Mexico. As you can see, it's an amazing site.

We are here at Cuicuilco, just outside downtown Mexico City, about 15 miles or so. This is an important site for a number of reasons. First, it's probably the oldest community in the Mexico Valley.

Today, we are in Chalula at the Great Pyramid. It's called the Great Pyramid because in spite of all the stories we hear about the pyramids of Giza, this pyramid is much bigger.