María Elena is a Chilean town and commune in Tocopilla Province, Antofagasta Region. According to the 2012 census, the commune population was 4,593 and has an area of 12,197.2 km2 (4,709 sq mi).

Calama is a city and commune in the Atacama Desert in northern Chile. It is the capital of El Loa Province, part of the Antofagasta Region. Calama is one of the driest cities in the world with average annual precipitation of just 5 mm (0.20 in). The River Loa, Chile's longest, flows through the city. Calama has a population of 147,886.