Salar de Pujsa is a salt flat located southwest of Salar de Tara, 83 kilometers from San Pedro de Atacama, and northeast of Acamarachi volcano. With a maximum altitude of 4,585 metres above sea level, Pujsa is considered the most isolated section in the reserve. The salt flat receives the waters of the Quepiaco and Alitar creeks and was listed as a Ramsar site in 2009. Birds that migrate across the hemispheres use the salt flat and surrounding land as a staging area, including the Wilson's phalarope.