2. kimberley big hole - south africa
kimberley大洞 - 南非
apparently the largest ever hand-dug excavation in the world, this 1097 meter deep mine yielded over 3 tonnes of diamonds before being closed in 1914.
世上最大手工開鑿的洞穴. 在1914年關閉以前,這個1097公尺深的礦總共生產超過3噸的鑽石
the amount of earth removed by workers is estimated to total 22.5 million tonnes.
估計工人挖出來的土有兩千兩百五十萬噸
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