The Atacama Region (Spanish: III Región de Atacama) is one of Chile's 15 first order administrative divisions. It comprises three provinces, Chañaral, Copiapó and Huasco. It is bordered to the north by Antofagasta, to the south by Coquimbo, to east with Provinces of Catamarca, La Rioja and San Juan of Argentina, and to west with the Pacific Ocean. The regional capital Copiapó is located at 806 km (501 mi) north of the country's capital of Santiago. The region occupy the southern portion of Atacama Desert, the rest of the desert is mainly distributed among the other regions of Norte Grande
High mountains surround the lake. Among them are El Muerto, Incahuasi, Falso Azufre, Peña Blanca, Barrancas Blancas, El Ermitaño, Vicuñas and the already mentioned Ojos del Salado, the highest volcano in the world.