Huantajaya or San Agustín de Huantajaya was a silver mine in Chile in the Tarapacá area of Atacama Desert east of Iquique. The silver riches of Tarapacá were known to the Spanish since the time of the conquest of the Inca Empire. Pedro Pizarro mentions Tarapacá as region with silver in his 1571 book Relación del descubrimiento y conquista de los reinos del Perú. The main period of activity was in the 18th century. During this time the nearby oasis town of Pica prospered as a supply center.
Mina de Huantajaya