Calama is a city located on the Loa river in the Antofagasta region, in northern Chile. It is located in a mining area and is known as an access road to the Atacama Desert. Just to the north, is the extensive open pit copper mine of Chuquicamata. The town of Chiu Chiu, near Calama, houses a 17th-century adobe church. To the southeast is the Valley of the Moon, in the Los Flamencos National Reserve, with a landscape similar to the lunar surface that has mountains and characteristic rock formations.