Cahuita National Park is a terrestrial and marine national park in the Caribbean La Amistad Conservation Area of Costa Rica located on the southern Caribbean coast in Limón Province, connected to the town of Cahuita. 

It protects beaches and lowlands and attracts tourists and other visitors who are able to snorkel in the protected marine area which contains the coralline reefs, as well as being a nesting ground for sea turtles.

February through April typically have the best underwater visibility. This is also one of the nicest and least developed beaches in Costa Rica.

- Wikipedia