Even though virtually all tourists head to 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 plus the shallow lagoon separating it through the mainland draws in migrating flamingos, pelicans and whale sharks (from https://israelgolhb.thelateblog.com/29059581/the-5-second-trick-for-mexico-trip