Today the spa Las Toscas confused with Atlantis (west) and Parque del Plata (east), but to the creation of these two locations, during the first decades of the twentieth century, gave name to the whole area. The train station Atlantida (Atlantis current station) was also called Las Toscas, and it was by Route 11, the gateway to the region until the construction of the interbalnearia route. In Las Toscas began the painstaking work of forestation that stretch of the coast of Rio de la Plata, developed over the years by several private companies. The success accompanied finally the most persevering by Mario Ferreira venture, whose name bears the main street of the resort, which starts in Atlantis and continues to Parque del Plata.
Territorial Society Uruguaya SA and subsequent made the initial fractionation and sale of land between 1911 and 1914, developing first spa Atlantis (1912). The first grounds of Las Toscas were sold in 1913, though many others already had owners and construcciones- and foreground dates from 1946.
The population of Las Toscas grew considerably since 1990, reaching a population of 1,793 people in 1996. As a result, there was a great development of services such as running water, electricity, waste collection, boarding houses, hotels , social and sports centers, soccer fields and basketball and various interdepartmental bus lines.