The Maya - Palaces and Pyramids of the Rainforest
Henri Stierlin Köln: Taschen 2004
A photographic, coffee-table book with an emphasis on Mayan architecture & art.
Cancun & The Yucatan
Nick Rider New York: Dorling Kindersley 2004
A handy pocket-sized travel guide for people travelling to the Yucatan peninsula.
Michael D. Coe New York: Thames & Hudson 2005
This is a more scholastic style book. It's a slow read, but has tons of information.
Dennix Tedlock New York: Touchstone 1996
The Mayan book of creation, one of the civilization's few remaining texts.
This site by Barbara McKenzie has some really detailed maps & photos of tons of Mayan sites.
PBS special on the Maya:
Evidence of Mayan environmental degradation & deforestation:
Jared Diamond, author of "Guns, Germs, and Steel" on "Why Societies Collapse":http://www.ted.com/index.php/talks/jared_diamond_on_why_societies_collapse.html
On the use of "Maya" vs. "Mayan":
Underground ruins discovered believed to be the Mayan portal to the underworld:
On the End of the Mayan Calendar in 2012:
Mayan City Discovered With Lazers - National Geographic:
Have another good Mayan link? Add it to the comments!