El Tómbolo de Punta Uvita  This is an extraordinary rocky formation produced by the refraction of the waves that deposit sediments and remains of marine organisms, which links a chain of rocks that forms the coral reefs.  During low tide, a 1km walkway joins the beach to the Tómbolo, where the reef vegetation begins.  From an aerial view, this rocky formation resembles the tail of a whale.  El Tómbolo is a hike that should not be missed. 

Isla Ballena y Tres Hermanas These are composed of rocky formations that have a depth between 6 and 20 meters, making it the home of many species such as Lobsters and Barracudas, Amongst others.  Furthermore, the islands are important for the nesting of reptiles and marine birds, like the brown booby (Sula leucogaster), the white ibis (Eudocimus albus), and the green iguana (Iguana iguana).

Coral Reefs The park possesses 18 species of identified corals, second largest in terms of diversity in the Pacific coast of the country.  The Núcura  (Porites lobata) is the most prevalent, and within the diverse reefs there are associated organisms such as the bumphead parrot fish (Scarus perrico), butterfly fish (Chaetodon humeralis), yellow fin surgeonfish (Acanthurus xanthopterus), freckled porcupine fish (Diodon holocanthus), lobsters, starfish, and sea fans.  By diving, the white-tip reef sharks and nurse sharks can be seen.

Mangroves The park has various mangrove forests that follow the river and empty into the ocean.  In the estuaries small fish and crabs can be seen and you can enjoy swimming in the brackish water.  This ecosystem is a refuge for the reproduction of birds, fish, and crustaceans, such as shrimps.

Playa Arco  This is a small pristine white sand beach protected by the only primary forest in the coastal area.  The beach, which also has a small cave, can be accessed during the low tide.

Contact with the people of National Park Marino Ballena