One of the best things to do in Cancun is to visit Isla Contoy, the last untouched island in the area. Only a certain number of visitors are allowed on the island each day, so you won’t find any crowds here. There are no homes, businesses, or inhabitants on the island, and it is a refuge for about 173 tropical bird species. It offers some of the best beaches in the Riviera Maya. You won’t find any waves or seaweed here, just crystal-clear blue waters.