It consists of the beautiful Congo, Hule and Bosque Alegre lagoons framed in a subsided volcanic caldera located on the northern slope of the Central Volcanic Cordillera. In the primary and secondary forests covering a good part of this refuge, life howler monkeys (Alouatta palliata) and white-faced capuchins (Cebus capucinus). In Hule lagoon, there are five species of fish, including the cichlids (Cichlasoma dovii and cichlasoma lyonsi). A dirt road goes from the Cariblanco gasoline station along the main road to Puerto Viejo as far as Hule lagoon.