largest open diamond mine in the world. at 525 metres deep with a top diameter of 1200 metres there’s even a no-fly zone above the hole due to a few helicopters being sucked in.
kimberley big hole - south africa
this 1097 metre deep mine yielded over 3 tonnes of diamonds before being closed in 1914.
earth removed by workers is estimated to total 22.5 million tonnes
glory hole - monticello dam
used when a dam is at full capacity and water needs to be drained from the resevoir
bingham canyon mine, utah
supposedly the largest man-made excavation on earth
the hole is 3/4 mile deep and 2.5 miles wide
‘geographical phenomenon’ known as a blue hole
1/4 mile wide, the depth in the middle reaching 145 metres. obviously the hole is a huge hit with divers
when water (usually rainwater or sewage) is soaked up by the earth on a large scale, resulting in the ground collapsing
clipped from: deputy-dog.com 
