云蒙山位于北京城东北方向怀柔县与密云县交界处,主峰高1414米,面积约400—500平方公里。其东是密云水库,水面宽广平如镜,将该山美丽的风光映入水中。黑龙潭、京都第一瀑、雁栖湖像蓝宝石一般嵌镶在它的周围,西侧白河如飘带蜿蜒绕山而过,构成了一幅立体画卷。相传春秋战国时期,一位人称 Yunmengshan is located in the northeast of Beijing, Huairou County and Miyun County junction, the main peak height 1414 meters, an area of ​​about 400-500 square kilometers. The east is Miyun Reservoir, the water is broad and flat like a mirror, the beautiful scenery of the mountain reflected in the water. Black Dragon Pool, the first waterfall in Kyoto, Yanqi Lake, like sapphires embedded in the general mosaic around it, the west side of the White River, such as ribbon winding winding mountain, forming a three-dimensional picture. According to legend, Spring and Autumn Period, one person said