🇦🇷 Argentina · Buenos Aires
Mar Chiquita is a beach town and nature reserve in the district of the same name, on the Atlantic coast of Buenos Aires province, north of Mar del Plata. Its most singular and valuable feature is the Mar Chiquita albufera: the only albufera-type coastal lagoon in Argentina, a body of water where fresh water from the streams mixes with salt water from the sea, linked to the ocean by a mouth or channel. This unique ecosystem was declared a Biosphere Reserve by UNESCO.
The lagoon and the wetlands, dunes, grasslands and beaches around it make up an environment of enormous biodiversity, birds above all, which makes Mar Chiquita a paradise for wildlife watching and a nature destination that is rare on the Buenos Aires coast. The town, quiet and family-oriented, offers beaches, watersports on the lagoon, fishing and a calm atmosphere, very different from the mass beach resorts.
This guide covers the essentials of Mar Chiquita with a practical eye: the albufera and the Biosphere Reserve, the beaches, birdwatching and nature, watersports and fishing, where to eat and sleep, and how to get there. It is an ideal destination for anyone after nature, quiet and a one-of-a-kind ecosystem facing the Argentine sea.
The beach town of Mar Chiquita grew up beside the albufera of the same name, a coastal ecosystem unique in Argentina. The lagoon's singularity and richness — where fresh and salt water mix — led to its protection: the area was declared a Biosphere Reserve by UNESCO in 1996, tying the beach town in with the conservation of one of the country's most valuable wetlands. The full story is on our history page.
Read the full history ↓The agro-export heart of Argentina: the endless pampa that was the land of the Querandí and the Pampa peoples, the domain of governor Rosas, the engine of cattle and wheat with La Plata as its purpose-built capital, cradle of the gaucho and of the Atlantic Coast where the whole country spends its summer.
Read the history of Buenos Aires Province →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
Twice a day, in one corner of the Buenos Aires coast, the sea pushes inland: with every high tide, salt water from the Atlantic forces its way through a narrow channel and works upstream into a lagoon where the pampas streams are waiting for it. That back-and-forth — fresh water coming down, seawater coming up — happens in only one place in all of Argentina, and that place is Mar Chiquita. The story of this town is, above all, the story of its albufera. Unlike the freshwater lagoons of the pampas or the open ocean beaches, what formed here is a body of water with exceptional characteristics: an albufera, that is, a shallow coastal lagoon separated from the sea by a dune barrier but connected to it through a mouth or channel. Ocean water flows in and out through that mouth with the rhythm of the tides, while the streams and watercourses of the basin — among them the Vivoratá stream and Canal 5 — bring in fresh water.
That constant mixing of fresh and salt water creates a singular brackish environment, with shifting salinity, that supports very particular flora and fauna adapted to this transition zone between land, river and sea. Crab flats, wetlands, dunes and grasslands complete a mosaic of habitats of great richness. With some 46 km² of open water, Mar Chiquita is recognized as the only albufera in Argentina, which gives it exceptional scientific and ecological value.
That unique character explains why the place has been studied and protected. The lagoon and its surroundings became a key conservation site, especially for their importance to birds — resident and migratory — and to coastal biodiversity, along a stretch of the Buenos Aires shoreline heavily reshaped by tourist development.
Long before the beach town existed, the shores and wetlands around Mar Chiquita were traveled by groups of Indigenous pampas peoples — hunter-gatherers who drew on the enormous wealth of resources of the Atlantic shoreline and the brackish lagoon. The crab flats, the fish shoals and the abundance of birds made the lagoon and the coastal strip an area of great value for subsistence.
With the expansion of the frontier and the creation of the Mar Chiquita district in 1839, the land of today's district was folded into the political and productive organization of Buenos Aires province. The administrative seat was set up in the town of Coronel Vidal, while the coastal strip remained for decades a rural, nearly unpopulated area given over to ranching and small-scale fishing.
Through much of the 19th century and into the early 20th, the mouth of the lagoon and the neighboring dunes were a rugged, little-visited spot, a far cry from the tourist destination that would come later. That low human presence, paradoxically, helped preserve the ecosystem until its value was recognized.
The growth of the beach town of Mar Chiquita followed, well into the 20th century, the boom in beach tourism along the Buenos Aires Atlantic coast, whose great engine was Mar del Plata after the railway arrived in 1886 and the 'Pearl of the Atlantic' urbanized at speed. But unlike the big mass-tourism centers, Mar Chiquita took shape as a small, quiet village, marked by the dominant presence of the lagoon and a natural setting that limited — and at the same time defined — its growth: the dunes, the marshes and the flood-prone ground kept the street grid contained, with none of the towers or the density of other points on the coast.
The place built its reputation around fishing, watersports on the sheltered waters of the lagoon and the chance to enjoy wide, calm beaches. Generations of sport fishers came for the pejerrey silverside and the mullet that breed in the brackish waters of the albufera, while the family feel, the low-density building and the closeness to Mar del Plata (some 35-40 km away) made Mar Chiquita a refuge for anyone looking for a calmer alternative to the crowded Atlantic beach towns in high season.
Over the course of the century the district — formally constituted in 1839, with its administrative seat in Coronel Vidal — also added other quiet beach villages: Santa Clara del Mar, which became the most populous and best-served tourist town in the district; Mar de Cobo, Camet Norte, Playa Dorada and Frente Mar, all of them consolidating a tourist identity built on human scale, nature and rest rather than on the crowds that defined Mar del Plata or Villa Gesell.
The exceptional value of the Mar Chiquita albufera led to international recognition. In 1996 the area was declared a Biosphere Reserve by UNESCO, under the MAB programme (Man and the Biosphere), which aims to reconcile the conservation of valuable ecosystems with sustainable human development. The reserve, also known as Parque Atlántico Mar Chiquito, takes in the lagoon, its wetlands and the surrounding coastal strip.
That distinction confirmed Mar Chiquita as one of the country's most important wetlands and steered its development towards environmentally respectful tourism. The area is also recognized as an important bird conservation site, with more than 200 species recorded, many of them migratory birds that use the lagoon to rest and feed on their long journeys across the continent.
Unlike the big beach towns that grew with their backs to nature, Mar Chiquita took shape as a destination where the lagoon and its biodiversity are the main draw. Birdwatching, low-impact boating, watersports on the lagoon and contact with a unique ecosystem attract those looking for nature and quiet. That identity — a beach town that is also a reserve, with the only albufera in Argentina at its heart — is what sets Mar Chiquita apart on the Atlantic coast and what sustains its appeal as a nature destination.
Today the coexistence of conservation and tourism remains the great challenge and, at the same time, the great virtue of the place: rangers, biologists and the district's tourism and environment office work to keep growing visitor numbers from threatening the lagoon's delicate brackish balance, while every season brings more travelers specifically interested in birdwatching, nature photography and ecotourism — a very different visitor from the one who came only for sun and sand in the peak decades of mass Buenos Aires beach tourism. That combination of exceptional natural history, small urban scale and international scientific recognition makes Mar Chiquita an unusual picture on the Argentine Atlantic coast: a town of fishers and summer visitors that ended up being, above all, the keeper of a wetland unique in the country.