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所屬欄目：地理中國
所屬頻道：CCTV-10科教
年份：2011
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簡介：在湖南省張家界的天門山有一個神奇的洞穴，這個洞穴坐落在一個懸崖峭壁之上，四面的崖壁光滑如洗，下面就是萬丈深淵。然而在這個洞穴中，有人發現過種種奇怪的現象，更是引起了人們的好奇。這個洞的洞口方方正正，係天然形成還是人工穿鑿，都是謎。收起
《地理中國》 20111127 揭秘天門山（下）
《地理中國》 20111126 探秘天門山（上）
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