Lima is located in the fertile valley of the Rímac River, which made possible the settlements and the foundation of the city in the first place. In spite of everything, the area is quite dry. Pantanos de Villa is, therefore, an exception, since the area is formed by small lakes and wetlands.
It is home to more than 200 species of birds. The area is fed by several sources. It consists partly of freshwater lakes, but saltwater lagoons have formed on the seaward side.
This mixture of salt and fresh water leads to the great variety of herbs, cane species and creatures. Herons, ducks and rare waterfowl find in Pantanos de Villa a great variety of foods and hidden places to nest and breed. Also the fish and insects of salt and fresh water have settled in the reserve.