Originally Posted by TwoBitWriter
The Mayan civilization did not include much of what is now Mexico, and the Aztecs covered most of it.
The classic maya (the folks who built the cities) and the Aztecs didn't overlap in time. The last of the classic cities was in ruins by AD 900, and the Aztecs didn't arrive in mesoamerica until the 1200's. The inhabitants of central Mexico (near Tenochtitlan, now called Mexico City) were also city builders: Teotihuacan is a huge site that is contemporary with the classic maya. While we know they weren't aztecs, we actually don't know who they were culturally; they left no writing.
And the area covered by the maya (both the classic city-states and their modern decendents) is roughly split between Mexico and Guatemala. There are lots of maya sites in Mexico.