Gadisar Lake is one of the major tourist attractions of Jaisalmer. Just leave the madding crowd behind and venture towards the outskirts and you will find yourself next to the famous Gadisar Lake . Contrary to the popular belief, it is not an oasis but a water conservation tank made around 1400 A.D. by the then maharaja of Jaisalmer, Maharwal Gadsi Singh. Can you believe this structure just outside the city walls once acted as a reservoir that controlled the entire supply of water to the arid city!