在北京房山区青龙湖镇的上万村,有个叫大南峪的山坳,这里是大房山东北余脉之沟谷,背西向东,四面环山,东南一罅为出峪之口,峪谷东端接近峪口处,北岭顿开,一峪北延,这是大南峪的北峪。大南峪地处幽辟,颇具林泉之胜,峪中林木茂密,荫翳蔽日。在古代文人的笔下,这是一处清雅绝尘之地:“春则野花吐秀,满谷幽香。夏则流水潺潺,垂竿可钓。秋则半山红叶,艳似春花。冬则积雪苍松,林挺琼树。” Fangshan District, Beijing Green Dragon Lake town of 10,000 villages, there is a colony of the Great South Valley, here is the big room of the northern margin of the valley of Shandong, west to the west, surrounded by mountains, southeast of a valley for the mouth of the valley, Valley Near the end of the Meiyukou Department, North Ridge Dayton open, a valley northward extension, which is the Great Northern valley valley. Da Nanyu is located in youpai, quite the victory of Lin Quan, Yu in the dense forests, shade shade day. In the ancient literary writers, this is an elegant and dusty land: “Spring is the wildflowers spit show, full of Valley fragrance .In summer, water gurgling, can be fishing rod .Mountain autumn leaves, Snow pines, Lin Tingqiong tree. ”