Arenal Volcano Palo Verde National Park Poas Volcano Marino Ballena National Park Barra Honda National Park Cahuita National Park Caño Negro National Park Carara Biological Reserve Braulio Carrillo National Park Chirripo National Park Corcovado National Park Guanacaste National Park Guayabo National Park Turrialba Volcano National Park Lomas Barbudal Biological Reserve Ostional National Wildlife Refuge Barra del Colorado Wildlife Refuge Cabo Blanco Natural Reserve Isla del Coco National Park Negritos, Pajaros & Guayabo Biological Reserves Juan Castro National Park Gandoca Manzanillo National Wildlife Refuge Irazu Volcano National Park Tapanti National Park Tortuguero National Park Isla del Caño Biological Reserve Las Baulas National Park Manuel Antonio National Park Rincon de la Vieja National Park Santa Rosa National Park La Amistad International Park Isla Bolaños Wildlife Refuge Peñas Blancas Wilderness Refuge Curu Wildlife National Refuge Golfito Wildlife National Park