A salt stalactite, inside a salt cave, in a paleo-salar, near Tolar Grande, on the Altiplano (Puna) of Salta, Argentina

Volcanic landscape near El Peñón, on the Altiplano (Puna) of Catamarca, Argentina

'Young' volcano, on the Altiplano of Catamarca, Argentina

Young volcano, lava flow, the Carachipampa lagoon, on the Altiplano of Catamarca, Argentina

Young volcano, lava flow, near Antofagasta de la Sierra, on the Altiplano (Puna) of Catamarca, Argentina

Lava flow, near Antofagasta de la Sierra, on the Altiplano (Puna) of Catamarca, Argentina

Tourists exploring a basalt flow, near Antofagasta de la Sierra, province of Catamarca, Argentina

The Andes: the Uyuni Salar, largest in the world, Bolivia

Night on the Olaroz Salar, province of Jujuy, on the Andean Altiplano, Argentina

The "Salinas Grandes" salt flat, province of Jujuy, on the Andean Altiplano, Argentina

The Atacama Salar (salt flat), in the Atacama Desert, Chile

A salt flat, on the Andean Altiplano (Puna), Argentina

The Tolar Grande salt flat, on the Altiplano (Puna) of Salta, Argentina

Water 'eye' on the Tolar Grande salt flat, on the Altiplano (Puna) of Salta, Argentina

Chemical rocks, geysers El Tatio, Chile, Andean Altiplano (high plateau), the Andes Cordillera

Chemical rocks, geysers El Tatio, Chile, Andean Altiplano (high plateau), the Andes Cordillera