Laguna de Pozuelos is a remarkable high-Andean lagoon situated in the Puna region of Jujuy province, Argentina, at an elevation of approximately 3,600 to 4,000 meters above sea level. Designated as both a UNESCO Biosphere Reserve and a Ramsar Wetland Site, this shallow, alkaline-saline lagoon covers roughly 7,000 hectares when at full capacity, though its surface area fluctuates considerably with seasonal rainfall patterns. The lagoon sits within a broad high plateau encircled by mountain ranges that define its basin, fed primarily by the Cincel and Santa Catalina rivers. The surrounding landscape is a stark and dramatic Andean steppe, characterized by rocky soils, sparse high-altitude vegetation, and an extraordinary diversity of wildlife — most famously, tens of thousands of flamingos from all three species found in Argentina. The reserve itself encompasses 16,000 hectares and was established in 1980 under Provincial Law Nº 3,749/80, with the Argentine National Parks Administration (APN) serving as the governing body.