The Costanera Sur Ecological Reserve is a protected natural area located in Buenos Aires, Argentina. Covering approximately 865 acres, it serves as a green space amidst the urban environment, providing a habitat for various species of flora and fauna. The reserve features walking and biking paths, making it accessible for visitors who wish to enjoy nature. Established in 1986, the reserve plays a crucial role in conserving biodiversity and promoting environmental awareness. It is home to numerous bird species, including migratory birds, and offers educational programs to help the public understand the importance of ecological preservation.