Isla Mujeres is a gorgeous island off the coast of Mexico near Cancun. It's kind of a hidden gem that not many people know about and it's beach is supposedly among the most beautiful in the world. (The beaches in Cancun are beautiful!
Cola de Caballo (Spanish for "Horse Tail") is a waterfall about 40 km mi) from Monterrey, Mexico, in the town of Villa de Santiago, Nuevo León. It is open to the public and is accessible via a walking path.