Link - Seven Amazing Holes

Here's a sample, and a link, to a site that features information on 7 pretty mazaing holes in the earth.

i’m pretty sure most people have seen this one. it’s an absolute beast and holds the title of 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.

Link