Located at an altitude of a little more than 5000 meters above sea level is Gurudongmar Lake. The lake is located in Sikkim, close to the Chinese border and is known for its scenic views. The fresh water lake remains frozen for most part of the year because of jaw dropping temperatures.But when the ice thaws, it gives way to crystal clear waters that just take your breath away. The rugged terrain around the lake adds to the experience. However, you should be prepared for some hard work if you want to visit this lake, because it involves a sufficiently challenging trek.