The Site is located in the southernmost part of the city of Lima, in the district of Chorrillos. It encompasses the entire Los Pantanos de Villa Wildlife Refuge and serves as a representative example of subtropical Pacific desert marshes. The Site is a resting place for migratory birds that arrive from both North America and the Andes, such as the Chilean flamingo (Phoenicopterus chilensis) and the peregrine falcon (Falco peregrinus). It also provides habitat for several globally threatened species, including the critically endangered waved albatross (Phoebastria irrorata), the endangered black rail (Laterallus jamaicensis) and the vulnerable Humboldt penguin (Spheniscus humboldti). The Site is used for recreation, tourism, education and scientific research. The main threats are habitat fragmentation due to the construction of roads and avenues that cross the area, excessive increase of dissolved organic matter in the water due to the lack of sewage systems in the surrounding areas, and obstruction of the natural drainage system.