6. Mirny Diamond Mine-Siberia 俄罗斯西伯利亚米尔钻石矿坑
The Mirny Diamond Mine is 525m deep and has a diameter of 1200m. It was the first, and one of the largest, diamond Pipes in the USSR. It is now abandoned. While it was still operational, it would take two hours for trucks to drive from the top to the bottom of the mine.
米尔钻石矿坑深525米,其直径为1200米,它是前苏联最早、最大的管状钻石矿之一,目前这处矿场已被废弃。据称,在该矿场处于开采运行时,一辆卡车从矿坑底部开到顶部需要两个小时的时间。