Ana Sagar Lake has been named after Anaji Chauhan. It is an artificial lake built by Anaji Chauhan, the grandfather of Prithvi Raj Chauhan. Dating from 1135 -1150 AD, the lake comprises catchments that were built with the help of local populace. Spread over 13 km, the lake also comprises Baradari or pavilions that were built by Shah Jahan in 1637.The Daulat Bagh Gardens,located in the area of the lake were built by Jehangir. A dam across the river Luni, the lake is surrounded by beautiful parks and marble pavilions. An island lies in the middle of the lake. To beautify the lake, additional constructions were made by the Mughal emperors.On a hill near the lake is located a Circuit House that used to be the British Residency. From the east side of the Dault Bagh Gardens, tourists can hire boat or water scooter to reach the island. Every summer, the lake gets dry.