剧情介绍
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Renowned caver Bill Stone is on a lifelong quest to go deeper beneath the earth than any human has ever ventured. Deep in the unexplored depths of Cheve Cave in Mexico, his goal is to set a new world record by finding a passage beyond a depth of 7,208 feet, proving once and for all his theory that Cheve is the deepest cave in the world. The expedition has been compared to climbing Everest - but in reverse. The three-month underground journey is a dangerous and highly technical adventure through over 12 miles of tight, twisting passages. The pressure to conquer the cave will push Bill and the team to the absolute limits of survival and sanity.
踏上从未有人涉足的地方，那种不可言传的激动与喜悦很好的从纪录片里传达了
洞穴探险可以称之为最危险的户外运动了吧，有些片段看得自己鸡皮疙瘩都起来的，仿佛是自己置身于2公里的岩石底下。
非常精彩的记录，无人抵达之境。
幽闭恐惧症在几个点位完全没法活着出来，太恐怖了。
光是看着这群探险者不断开辟走出洞穴出口的过程就已经紧张和兴奋不已，不敢想象若是自己亲身经历会是多么刺激。
在连续9年申请成为NASA的宇航员未果后，男主把目光转向了深地，68岁时，他仍旧在切维洞穴待解的前路中探索。