This is a small area comprising a shallow freshwater lake and marshes amidst the cultivated plains of Gurgaon district of Haryana. The main "salt pan" within the lake almost dries up in summer but after a good monsoon attracts a large number of wetland avian species, especially in winter when migratory species arrive. Large herds of pelicans, flamingos, ducks, geese and waders may be seen here as well as avocets, sandpipers, starlings, blue-throats and more. A winter sunrise over Sultanpur lake is an experience no birdwatcher in Delhi should miss.