Antofalla is a large and very remote stratovolcano in Catamarca Province in northwestern Argentina. It is located on the northeastern edge of the Puna de Atacama, a high desert plateau east of the Atacama Desert. It lies just west of the Salar de Antofalla, a large playa over 140 km (87 mi) in length. Inca ruins can be found at the volcano's summit, offering definitive proof of numerous Pre-Columbian ascents.
- Elevation: 6,440 m (21,129 ft)
- Prominence: 1,957 m (6,421 ft)
- First ascent: Inca, Pre-Columbian