Ana Sagar Lake is a historic artificial lake located in Ajmer, Rajasthan, which recently gained media attention following reports of a significant number of fish deaths. The lake was constructed by Arnoraja Chauhan, the grandfather of Prithviraj Chauhan, by damming the Luni River between 1135 and 1150 AD. Beyond its historical importance, the site is a prominent tourist destination featuring a central island accessible by boat. In addition to current environmental concerns, the Rajasthan government has actively proposed development plans for wetlands near Ajmer to support ecological balance and planned urban growth.