Isla Mujeres
Playa Norte on Isla Mujeres. Photo via Wikimedia Commons.
A small Caribbean island off the coast of Cancun, reached by a 20-minute ferry ride. Playa Norte is one of Mexico's prettiest beaches, and the island sits next to the MUSA underwater museum, where hundreds of statues rest on the seabed for snorkelers and divers. Sea turtles nest here from May to September.