Monumento natural Laguna de los Cisnes, Protected wetland in Tierra del Fuego Province, Chile.

Monumento natural Laguna de los Cisnes is a protected wetland along the Strait of Magellan coast in Tierra del Fuego. The reserve covers around 25 hectares and sits in flat terrain characterized by lakes and marshes, positioned north of Porvenir.

The site received protected status in 1982 when authorities designated it as a national park, with a reclassification coming shortly after. This change reflected a new approach to safeguarding the fragile coastal landscape.

The lagoon's name comes from the black-necked swans (Cygnus melancoryphus) and Coscoroba swans (Coscoroba coscoroba) that gather on its seven islets. The reserve was created to protect this varied and rare birdlife, and the islets themselves carry no vegetation, so the birds are the main thing to watch for.

A gravel road of around 8 kilometers reaches the monument and stays passable year-round, making it an accessible destination. The route runs along the coastline and gives visitors views of the surrounding landscape from the road itself.

The protected area covers only the seven islets inside the lagoon, not the water itself, and those islets carry no vegetation. The birds recorded there include the black-necked swan, the Coscoroba swan, the Chilean flamingo, the canquén and caiquén geese, the carancho or traro, and several duck species.