The Ecological Reserve is an unusual and unexpected result of highway construction throughout Buenos Aires during the mid-20th century. Construction debris and the rubble of demolished buildings were dumped into the Río de la Plata. Over time, sand and sediment began to build up, and then grass and trees began to grow. The birds followed, and now the area is a preserve.
The 360-hectare ecological reserve, created on top of the refuse of a former dump site is an expansive green area, serving as a refuge for quiet walks, jogging, bike riding and enjoying some Buenos Aires’ fresh air.