Argentina
Mar de Ansenuza
South America's largest salt lake turns pink with thousands of flamingos each winter.
Mar de Ansenuza in Córdoba Province is South America's largest saltwater lake — 6,000 square kilometres of shallow brine that turns pink in summer from the algae that the flamingos depend on — and its existence in the middle of the Argentine agricultural pampas, where you expect nothing but soybeans, is its first surprise. The flamingos number in the hundreds of thousands during peak season; the salt concentration is three times higher than the ocean; and the new national park established in 2022 protects a wetland ecosystem that Argentine science barely had time to document before the designation came through.
Mar de Ansenuza (Laguna Mar Chiquita) is the largest saltwater lake in South America, covering approximately 6,000 square kilometres in northern Córdoba Province, and one of the most important wetland systems in the western hemisphere for migratory shorebirds on the Central and Pacific flyways. The lake was recognised as a Ramsar Wetland of International Importance in 2002, and the Mar de Ansenuza National Park, established in 2022, provides formal protection for the first time. Three flamingo species — Chilean, Andean, and James's — use the lake as their largest Argentine breeding and feeding site, with an estimated 90,000-200,000 flamingos present during peak summer season. The lake's salinity, approximately 300-350 grams per litre (ten times ocean salinity), is maintained by evaporation without outlet and fluctuates with rainfall over multi-year cycles — the lake reached its maximum recorded extent of 9,000 square kilometres in the 1980s and has contracted significantly since.
Solo
Mar de Ansenuza at dawn in February — the pink flamingo populations moving across a lake that is itself turning pink from the algae bloom, the salt flats crystallising in the morning light, the new national park infrastructure not yet in place to manage the experience — is one of the most unusual wildlife spectacles in continental South America.
Couple
The salt lake's setting in the agricultural pampas — an improbable sea in the middle of nowhere — makes the encounter feel specifically Argentine: the country that keeps producing landscapes that have no business being this extreme in this location. The flamingo numbers at peak season need no augmentation from the surroundings.
- The lake covers 6,000km² and is the largest salt lake in South America — in wet years its salinity rivals the sea.
- Chilean, Andean, and James flamingos all nest or feed here — winter concentrations are visible from shore without a boat.
- The town of Miramar on the southern shore has a lakeside walkway and a natural history museum on the flamingo ecosystem.
- The lake's colour shifts from silver to pink to copper depending on flamingo density, cloud cover, and wind.
Pejerrey pulled fresh from the lake's edge and fried whole at Miramar's simple waterfront comedores.
The salt-crusted shores sit within reach of Córdoba's craft beer scene and empanada tradition.
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