When nearly all of tourists head to Isla Mujeres, locals choose to visit the greater silent Isla Holbox for each day or two. The island is surrounded by blue waters as well as the shallow lagoon separating it in the mainland appeals to migrating flamingos, pelicans and whale sharks (from https://mexico-travel-guide64310.blogdun.com/29103599/what-does-best-places-in-mexico-mean