In the XIX century, the region where the Pinamar Partido stays nowadays was a desertic area plenty of dunes facing the sea.

[4] They had bought the land from Don Manuel with the aim of designing a sophisticated seaside resort with the same model as that city of Belgian origin whose name, Ostend, means “End of the East”.

These works were made very hard, since in addition to the inclemency of the winds, the materials for the constructions had to be sent from Buenos Aires, being the Cabo Corrientes steamship one of the means used for transportation at that time.

[3] Finally, on April 6, 1913, the founding ceremony of the new city was celebrated and an important advertising campaign was produced to promote the sale of the lots.

To the south of Ostende, another of Felicitas's heirs, her nephew Don Héctor Manuel Guerrero, decided in 1918 to start fixing the sand dunes of his estate called Charles to later install a nursery and plant species from different regions of the world.

Over time these plantations, which were carried out with carts pulled by 8 horses, were transformed into a forest as rich in species as the one we know today by the name of "Cariló", a Mapuche word that means 'Green Medano'.

This is how the fixation of the dunes begins, the opening of streets and the first constructions such as La Hostería, the Hotel Pinamar, where the first tourists came to stay, the water tank at the Mirador de Galatea and Parque Del Tridente and the first private houses.

On February 14, 1943, Pinamar was inaugurated as a spa and shortly after the Urbanization Master Plan presented by the architect Jorge Bunge was approved.

The economy of Pinamar Partido is dominated by the summer tourist season (December–February), which sees hundreds of thousands of Porteños make their way to the Atlantic coast of Buenos Aires Province.