Highlights: The Crystal Sugar Valley is located in Daxinzhai Town, Funing County, Qinhuangdao, Hebei Province. Crystal Sugar Valley is a quiet canyon. What is amazing is that there is a magical scene here: in the end of April to the end of July every year, there will be cold air coming out from the ground, and the moisture will condense into ice on the ground, and it will become a "refrigerator" every summer. However, in the winter, the ice disappeared, but the warm moisture emerged from the ground.