Gadsisar 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 Gadsisar 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!
This place was selected because it had a certain amount of declivity already and it automatically retained some of the rainwater. If you are lucky and venture out in winters, you might get to see a variety of migratory birds. Due to its proximity to Bharatpur, some of the birds get attracted to this place also. Don’t miss to carry a good pair of binoculars and SLR camera with a wide-angle lens if you want to take away some really mesmerizing snaps.
You will find whole varieties of temples and shrines surrounding the lake. In later years it became more of a pilgrimage spot. The beautiful gateway that arches across the road down to the Lake was built by royal courtesan named Tillon in the end of 19th century, known as Tillon Ki prol (Gate of Tillon). Lord Vishnu’s statue was installed in the year 1908 A.D. or the gate by the courtesan & declared Krishna Temple to save it from demolition by the then Maharawal.
Source: Jaisalmer.org.uk. The address of Gadisar Sagar Lake, Jaisalmer is Postal Colony
It's in Postal Colony