Ana Sagar Lake is an artificial lake situated in the city of Ajmer in Rajasthan state in India. It is was built by Anaji Chauhan, the grandfather of Prithvi Raj Chauhan, in 1135 -1150 AD and is named after him. The catchments were built with the help of local populace. The lake is spread over 13 Kilometers. The Baradari or pavilions were built by Shahjahan in 1637 and Daulat Bagh Gardens by Jehangir. There is a Circuit house on a hill near the lake that used to be British Residency. There is an island in the center of the lake which is accessible by boat. Boats could be hired from the east side of the Dault Bagh. There are Chowaptty and Jetty walkway next to each other and Baradari to capture the scenic of the lake. The lake is the biggest one in Ajmer, with the maximum catchments area (5 square km built up area).