不老屯镇地处北京密云水库正北岸的上风上水地带,北部是绵延的燕山山脉,南部紧临密云水库,依山面水,风景秀丽。近200平方公里的镇域都在密云水库水源一、二级保护区内,地表水达到国家二级饮用水标准,地下麦饭石矿泉水量大、质优,林木覆盖率近80％,空气负氧离子在2万以上,净水净土,极具开发价值。 Not Laotun Zhen is located in Beijing’s upper reaches of the Miyun Reservoir is the upper reaches of the Sheung Shui Strip, north of the Yanshan Mountains are rolling, close to the Miyun Reservoir in the south, mountain water, beautiful scenery. Nearly 200 square kilometers of town are Miyun reservoir water sources in one or two protected areas, surface water to reach the national drinking water standards, underground medical stone mineral water, high quality, nearly 80% coverage of trees, air negative Oxygen ions in more than 20,000, pure water net, great development value.