The worlds biggest hole is located in Russia.
The giant hole is actually a diamond mine in Eastern Siberia near the town Mirna.It is 525 m deep, and 1,25 km.in the diameter.
This dumper is one of the biggest in the world: length: 13,36m width: 7,78m height: 6,65 m.
This giant machine appears just a small point!! (Red arrow)
The suction above the hole resulted in several helicopter crashes, so all flight above the hole now is prohibited.