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所属栏目：地理中国
所属频道：CCTV-10科教
年份：2011
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简介：在湖南省张家界的天门山有一个神奇的洞穴，这个洞穴坐落在一个悬崖峭壁之上，四面的崖壁光滑如洗，下面就是万丈深渊。然而在这个洞穴中，有人发现过种种奇怪的现象，更是引起了人们的好奇。这个洞的洞口方方正正，系天然形成还是人工穿凿，都是谜。收起
《地理中国》 20111127 揭秘天门山（下）
《地理中国》 20111126 探秘天门山（上）
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