Chile Route 27
Chile Route 27 is a main road in the northern portion of Chile. It runs from San Pedro de Atacama to Paso de Jama. A short road off Route 27 heads north to Portezuelo del Cajón. Another adjacent road leads to Llano de Chajnantor Observatory. The Chile Route 27 reaches an altitude according to OpenStreetMap of at in a roaddistance of west of the border, making it one of the highest highways in Southamerica.
The sections Salar de Pujsa and Salar de Tara-Salar de Aguas Calientes of Los Flamencos National Reserve can be accessed by this road.