David Kuijt (pronounced like Kite) who is best known in DBA wargaming circles has posted the following page on how he constructed a model Mayan Pyramid. He also has a page on constructing a smaller Aztec pyramid, and lots of other neat stuff.  

http://www.umiacs.umd.edu/~kuijt/dba105/Castillo/Castillo.html

Cheers,

--dave