The island of Cozumel is situated along part of the Mesoamerican Reef, the largest barrier reef in the Western Hemisphere. The coral here is some of the healthiest in the region, sustaining a diverse array of marine life and creating an undersea rainbow of color. There are any number of ways to witness this underwater spectacle, from snorkeling and diving to glass-bottom boats and submarines. Cozumel has some of Mexico’s most beautiful beaches, from Playa Palancar to Playa El Cielo, so you might simply pick your favorite stretch of silvery sand and wade into the crystalline waters to see what treasures you find. Chankanaab National Park offers all of these activities as well as snuba, tropical gardens, a tequila experience, private cabanas and the chance to swim with dolphins or manatees. Those interested in Mexico’s Mayan heritage will want to visit the temple ruins at San Gervasio on Cozumel or perhaps even devote the entire day to traveling to the mainland to explore Chichen-Itza, named one of the New 7 Wonders of the World.