A Mexican National Government Nature Preserve, as your boat approaches this island you feel a little like Robinson Crusoe, so undeveloped is it. A favorite nesting site for frigate birds, there were more of them in the air over the island than I've seen, total, in my lifetime. The trees were full of their young, and sharks swam lazily near the surface of the lagoon, their dorsal fins just occasionally breaking the surface. It's a convenient day trip from Cancun. We chose to take the Kolumbustour.com version, traveling to and from the island on a replica of the Pinta, which takes two hours each way. The food was the best I've had, of its type, consisting mainly of fish cooked in the local style, Tikinchik.