The Eduardo Avaroa Andean Fauna National Reserve is a protected area located in the Sud Lípez province of the Potosí department, in southwestern Bolivia. It lies within the high Altiplano and the Andes Mountains, at altitudes ranging between 4,200 m (13,800 ft) and 5,400 m (17,700 ft). The reserve was officially established in December 1973 and is named after Eduardo Abaroa, a national hero recognized for his role in the War of the Pacific. It is one of Bolivia’s 60 protected areas and is categorized under IUCN Category IV, primarily for the protection of birds that inhabit the different lagoons. In 2018, it attracted approximately 153,000 visitors, making it the most visited protected area in the country.