If anyone is going to do any of the Mayan sites you might want to head over to http://www.cancunmap.com/chichen_itza.html
They have great maps that I use when I'm traveling to the area.
Road map from Cancun to Chichen Itza and also to Coba, Tulum, Ek Balam, & Chiquila.
Includes hotels, restaurant reviews, tours, attractions, and more.
Mayan ruins: Chichen Itza, Coba, Tulum, Ek Balam, & Yaxunah.
Cenotes: Punta Laguna, Ik-Kil, Yokdzonot, X'Canche, Samula, Dzitnup, Suytun, & Zaci.
Cities: Valladolid, Coba, Ek Balam, & Piste; plus small villages along the way.
Other attractions: Nuevo Durango cave, & Balankanche cave.
I'm waiting for the updated Cozumel maps myself.
Phil & Liz