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    栈道是沿悬崖峭壁修建的一种道路，是古代先人不得已而为之的一大发明。为了在深山峡谷间通行，就在河水隔绝的悬崖绝壁上用铁器开凿桩孔，插上石桩或木桩。上面铺木板或石板，供行人通行。有些军事要隘的栈道多用于防御和战争。总体说，历史上的每一条栈道，在经济文化交流和战略方面发挥了重要作用。

随着社会的发展，如今所修的栈道为的是追求新奇和异样的东西，很多景区开发栈道项目的最终目的就是显秀，刺激消费拉动经济。游客行走在悬崖边的栈道上体验其惊险的同时，没有多少人能够想到栈道修建的艰辛。本组图片，呈现湖南平江石牛寨景区，玩命民工为了挣钱在悬崖峭壁修栈道的艰辛与奇迹。

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