The Conquistadors first saw Mexico from the shores of Cozumel while searching for gold. Today, visitors to the island continue to seek out gold and silver jewelry in the shops of San Miguel while having a great time in its many local bars and restaurants. Plus, the waters around Cozumel's sheltered coral reefs make this one of the best snorkeling areas in the world. Don't miss the opportunity to explore the ruins of the ancient Mayan city of Tul��m, majestically perched above the turquoise Caribbean. The site was occupied as far back as 600 A.D. However, it was most densely populated around 1200 A.D. You will be struck by the pyramid-shaped El Castillo, which dominates the city from atop a forty-foot cliff.