简介：攀登家于1000英尺陡峭悬崖的真实体验，为求于悬崖壁上寻找未被发现的动物物种。

简介：　　A team of elite cavers led by 68-year old Bill Stone attempts a months-long expedition to officially make Cheve Cave in Oaxaca, Mexico the world’s d

简介：A team of elite cavers led by 68-year old Bill Stone attempts a months-long expedition to officially make Cheve Cave in Oaxaca, Mexico the world’s dee