the world’s biggest holes is located in Russia

ne of the world’s biggest holes is located in Russia.
(Massive Man Made Holes)
The giant hole is actually a diamond mine in Eastern Siberia near the town Mirna. It is 525 meters deep and 1.25 km in the diameter. Mirna’s open pit diamond mine closed operations in 2004 after nearly 50 years. According to bizarre reports air traffic has been suspended due to the “suction above the hole” reporting of extreme downdrafts over the pit.{N.N}