Serolsar Lake, also known as Seruvalsar Lake or Serol Sar Lake (sar means pond), is located at an altitude of nearly 10, 170 ft above sea level. Located in the beautiful Seraj Valley of the Kullu region, the lake holds great religious significance for the locals. As per the locals, it is said that even if a small leaf falls in the lake, the birds pick it up to keep the lake clean. As per the locals, the lake is connected with Budhi Nagin, the goddess of all the snakes and all naag deities. There is a temple adjacent to the lake dedicated to the goddess. The locals believe that the lake is very deep, and there was a golden palace at the bottom where the goddess used to live. Pandavas have been said to visit here during their exile period.