If you’re in Costa Rica to search for intense biological diversity, you needn’t go any further than the Parque Nacional Corcovado, a 42,936-hectare park in the south-west corner of the Peninsula de Osa. The park protects the last great original tropical rain forest, not only in Costa Rica but in all of Pacific Central America, and is home to Costa Rica’s largest populations of scarlet macaws, tapirs, harpy eagles and giant anteaters, all endangered. The park is truly a testament to biological diversity, hosting eight different habitats, including mangrove swamps, primary and secondary rainforests and cloud forests.