Far from the traditional circuit of the Obelisk, San Telmo, Recoleta, or Calle Corrientes, the City of Buenos Aires preserves natural spaces that function as true green lungs amidst the urban landscape.
A few meters from the Río de la Plata, three ecological reserves protect wetlands, birds, native plants, and ecosystems essential for the environmental balance of Buenos Aires.
These are the Costanera Sur Ecological Reserve, the Lago Lugano Reserve, and the Ciudad Universitaria Ecological Reserve, three areas that were born on degraded lands, former dumps, or abandoned landfills, and today represent some of the most important examples of urban environmental restoration in Argentina.
In addition to hosting a huge biodiversity, these spaces fulfill essential functions for the city, such as regulating temperatures, absorbing excess water, and improving air quality in densely populated areas.
Costanera Sur: a recovered wetland facing the Río de la Plata
With Puerto Madero as a backdrop, the Costanera Sur Ecological Reserve covers about 350 hectares and contains four lagoons fed by rain and groundwater. More than 340 bird species have been recorded there, a figure that makes the place one of the main wildlife observation points in the country.
The area also protects more than 2,000 species of flora and fauna thanks to a system that connects the lagoons with the Río de la Plata and helps to face drought periods. Due to its ecological importance, the site was declared a Ramsar wetland in 2005.
However, decades ago the panorama was completely different. The area first functioned as a beach resort and then as a debris dump during the construction of highways in the 70s. Over time, nature recolonized the area until transforming it into a natural reserve in 1986.
Lago Lugano and Ciudad Universitaria: biodiversity between cement and wetlands
In Villa Soldati, within Parque Roca, the Lago Lugano Reserve became another example of environmental recovery. The space covers 36 hectares and hosts trails, artificial wetlands, freshwater turtles, otters, and more than 118 bird species.
Additionally, the site features solar lighting systems and structures made with biosynthetic materials. Studies are also conducted there on native plants capable of absorbing heavy metals and capturing carbon.
On the other hand, the Ciudad Universitaria Ecological Reserve, in Costanera Norte, protects 23 hectares of coastal environments linked to the Río de la Plata. The area is part of a biological corridor that connects the Paraná delta with natural reserves of San Isidro, Vicente López, Costanera Sur, and Punta Lara.
The benefits of ecotourism within large cities
The growth of urban ecotourism has become a key tool for promoting environmental conservation and improving the quality of life in large cities. These spaces allow thousands of people to access nature contact experiences without the need to travel long distances.
Likewise, urban reserves promote environmental education and help raise awareness about the importance of protecting wetlands, birds, and vulnerable ecosystems within metropolitan environments.
Moreover, ecotourism encourages healthy recreational activities such as walking, cycling, and bird watching, promoting the physical and emotional well-being of the population.
Finally, these natural environments also strengthen the climate resilience of cities, as they absorb rainwater, reduce the heat island effect, and contribute to decreasing atmospheric pollution in highly urbanized areas.
