龙门洞，始于春秋，建于西汉，盛于金元，位于陕西宝鸡陇县西北陕甘交界处的景福山麓，古名灵仙岩，龙门洞是六盘山南段景福山的一部分。它是省级对外开放道观、重点文物保护单位和森林公园。是道教龙门派圣地，同样也是中国五大悬空寺之一，是历史最悠久、建筑最惊险、道教地位最重要、自然地理位置最独特、山水聚合，清净纯净清修地，悬空道观

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