Sedimentrary rocks in the 'Quebrada de Flechas', on the road between Cafayate and Cachi, province of Salta, Argentina

Road on the Andean Altiplano (Puna, high plateau), Argentina, the Andes Cordillera

Road on the Andean Altiplano (Puna, high plateau), Argentina, the Andes Cordillera

Road that climbs the 'Cuesta de Lipan' to the Altiplano (high plateau) of Susques, Jujuy, Argentina, the Andes Cordillera

Road that climbs the 'Cuesta de Lipan', to the Altiplano of Jujuy, Argentina

Sign describing the La Polvorilla ("Tren a las Nubes") rail bridge, Salta province, Andean Altiplano, Argentina

La Polvorilla ("Tren A Las Nubes") rail bridge, Salta, Argentina, on the Andean Altiplano (high plateau), the Andes Cordillera

La Polvorilla ("Tren A Las Nubes") rail bridge, Salta, Argentina, on the Andean Altiplano (high plateau), the Andes Cordillera

La Polvorilla ("Tren A Las Nubes") rail bridge, Salta, Argentina, on the Andean Altiplano (high plateau), the Andes Cordillera

The 'La Polvorilla' ("Tren a las Nubes") rail bridge, near San Antonio de los Cobres, Salta, on the Andean Altiplano, Argentina

The 'La Polvorilla' ("Tren a las Nubes") rail bridge, near San Antonio de los Cobres, Salta, on the Andean Altiplano, Argentina

The La Polvorilla ("Tren a las Nubes") rail bridge, Peter Feibert at right, Salta province, Andean Altiplano, Argentina

The La Polvorilla ("Tren a las Nubes") rail bridge, Salta province, Andean Altiplano, Argentina

The La Polvorilla ("Tren a las Nubes") rail bridge, Salta province, Andean Altiplano, Argentina

Railroad down the 'Quebrada del Toro' valley, province of Salta, Argentina

Power transmission lines, on the Altiplano of Salta, Argentina