Matilla is a Chilean village and oasis in the interior of Atacama Desert. It lies four kilometers southwest of the oasis town of Pica. As of 2017 Matilla had 380 inhabitants and 217 homes. It hosts underground aqueducts in various states of decay. These aqueducts are locally known as socavones and tap Pica Aquifer.

The Atacama Desert is a desert plateau located on the Pacific coast of South America, in the north of Chile. Stretching over a 1,600 km (990 mi) strip of land west of the Andes Mountains, it covers an area of 105,000 km2 (41,000 sq mi), which increases to 128,000 km2 (49,000 sq mi) if the barren lower slopes of the Andes are included.