It connects Tortuguero National Park and La Selva Biological Station in the Cordillera Central in Costa Rica, with the Barra del Colorado Wildlife Refuge, the Indio-Maíz Biological Reserve, Punta Gorda Natural Reserve and the Cerro Silva Natural Reserve in Nicaragua, thereby allowing animals to move between the regions. This region is now known as the San Juan-La Selva Biological Corridor, located between the San Carlos River and the Sarapiquí River and other areas near the Nicaraguan border.