Now that is a big hole!
The Mir mine (Russian: Кимберлитовая алмазная трубка «Мир» Kimberlitovaya Almaznaya Trubka “Mir”; English: kimberlite diamond pipe “Peace”), also called the Mirny mine, is a former open pit diamond mine, now inactive, located in Mirny, Eastern Siberia, Russia. The mine is 525 meters (1,722 ft) deep (4th in the world) and has a diameter of 1,200 m (3,900 ft),[1] and is one of the largest excavated holes in the world.
It was a valuable hole, too: In the 1960s the mine was producing 10,000,000 carats (2,000 kg) of diamond per year, of which a relatively high fraction (20%) were of gem quality.
https://en.wikipedia.org/wiki/Mir_mine
https://en.wikipedia.org/wiki/Mir_mine
And it’s only the fourth deepest (open pit) mine in the world.
Still pretty amazing. Would it not be nice to stumble on an untouched Kimberlite find…
I’m sure I am not ruthless enough to survive such a find.