This park is just south of Quepos on the Pacific Coast, 132 km from San José. Perhaps It is so popular because of its expansive white sand beaches backed by an evergreen forest that grows right up to the high tide line. The principal habitants are primary forest, secondary forest, mangrove swamps, lagoons and beach vegetation. There is quite a varied fauna with 109 species of mammals and 184 of birds. The park includes 12 little isles just off the coast; these often visited by a number of dolphins and, at times, migrating whales can be observed.