The snorkeling is amazing.
The coral reef communities in Cozumel's clear, blue-green waters are thriving. There are a few reasons for that. One, the Mexican government established the Cozumel Reefs National Marine Park more than two decades ago, which made touching or taking marine life from the reefs inside a crime. And two, the island's geography naturally protects many of the coral reefs. Grab a snorkel and some fins and ask a local to take you out to a scenic underwater spot, or just push off from the waterline; coral reefs grow almost all the way up to the island's craggy beach. (Scuba divers, you'll love the sea here, too!)