Carara Biological Reserve (4,700 hectares) is a transition zone between dry tropical forest and the wetter regions to the south. It is laced by countless rivers, the largest being the Tarcoles. During the rainy season, the Tarcoles floods its banks, creating a large lagoon that quickly fills with water hyacinth. Crocodiles and caimans are easily spotted along with plenty of wading birds. Coatimundis, peccaries, white-face capuchin, howler and spider monkeys, and the rare-two toed sloth can all be found here along with a great variety of plant life including fabulous heliconias. Carara is one of the few nesting areas remaining for the scarlet macaw. Throughout the day, the macaws can always be heard and often seen in flight, particularly around dusk. There are two paths. One starts at the main entrance and takes a short circular route, the other begins 2 km away and passes the lagoon.

Easily accessible for day trips from San Jose, but accommodation also available locally.It is located 88 km west of San Jose