5.Great Blue Hole
An underwater swallow hole placed sixty miles (60) off the coast of Belize. the hole is three hundred (300) metres across and a hundred twenty five metres deep
4.The Devil Sink Hole
Edwards County, TX is that the home of The Devil’s Swallow sink hole, a huge underground stone chamber with a gap fifteen (15) metres wide and a cavern 106 metres deep.
3. Udachnaya Pipe Hole:
over Six hundred (600) metres deep and is taken into account the third deepest and wonderful mine hole in the world.The mine had calculable reserves of 225.8 million carats of diamonds associate degreed an annual production capability of ten.4 million carats.
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2.Guatemala Sinkhole
1.Mirny Diamond Mine
The Mirny Diamond Mine was the primary developed and largest diamond mine within the land. It’s 525 metres deep and includes a high diameter of 200 metres.
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