There are three islands near Cancun; Isla Mujeres, Cozumel, and Isla Contoy. All of them, you can be visited during a day trip excursion.🌴😎 One of the best Cancun things to do is to visit one of the islands. What is it about visiting a tropical island? There’s just something so unique and memorable about it, and if you’re staying at a resort, it’s a nice change of scenery.😍