Brian May commented, in part:

A few years back I went to Chitchen Itza in Mexico where the Mayans (( believe, but always get confused with them and the Aztecs who I think were much further south), had constructed an observatory.

The Aztecs had traceable roots northward, in what is now the US. The Aztec culture at the time of the conquest was in south-central Mexico, around what is now Mexico City.

The Mayans were centered further south than that.

Dave Oesterreich