Cerro Walther Penck (also known as Cerro Cazadero or Cerro Tipas) is a massive complex volcano in the Andes, located in northwestern Argentina, Catamarca Province, Tinogasta Department, at the Puna de Atacama. It is just southwest of Ojos del Salado, the highest volcano in the world. Walther Penck itself is perhaps the third highest active volcano in the world.