The Mirny diamond mine is located in Siberia, East Russia.It is the largest artificial underground cave in the world, its depth is about 525 meter, and the radius of its entrance reaches 1200 meter.

• 米尔金刚矿场位于俄罗斯东西伯利亚地区，是世界上最大的人造地穴，它深约525米，入口直径达到了1200米。