Though the majority of tourists visit Isla Mujeres, locals choose to visit the more silent Isla Holbox for on a daily basis or two. The island is surrounded by blue waters and also the shallow lagoon separating it from your mainland draws in migrating flamingos, pelicans and whale sharks (from https://manuelvpjas.blogoxo.com/28693664/5-simple-techniques-for-top-places-to-go-in-mexico