SITTING like a precious jewel inlaid in the mysterious frontier of the Sichuan-Yunnan region lies the breathtaking Lugu Lake.It is one of the highest lying lakes by altitude in China’s interior region.The lake is located at the junction of Yanyuan County,Sichuan Province,and Ninglang County,Yunnan Province.It is also one of the deepest freshwater lakes in China with depths reaching over 70 meters at the deepest point and 40 meters on average.