As you've probably already noticed by looking at a map of Mexico its coastline of thousands of miles offers endless amounts of exploration. However, seeing as your interest in water activities focuses on snorkeling you'll want to concentrate on Mexico's Caribbean coast. That isn't to say that there is no snorkeling on the Pacific coast (or the Sea of Cortez); it just isn't as spectacular as the reefs in the Caribbean.

You'll find Mexico's premier snorkeling sites off the east coast of the Yucatan Peninsula in the state of Quintana Roo. By far the number one destination there is Cancun. Personally, I think the coast line south of Cancun, called the Mayan Riviera, is a much more preferable area than Cancun itself. This hundred-plus mile corridor along the coast includes Playa del Carmen, Akumal, Tankah, Tulum, and the island of Cozumel.

Some websites that you might find helpful include:

http://www.bill-in-tulsa.com/

http://www.locogringo.com/index.cfm

http://akumaladventures.com/

These should get you started. If you have more questions don't hesitate to ask.

John in San Diego