Biggest holes on earth

 Monticello Dam

This dam is situated in California, USA.
Diameter: 22 m
Depth: 21 m

Kennecott Bingham Canyon Mine

This minew is situated in the USA on the south-west of Salt Lake City.
Diameter: 4 km
Depth: 1.2 km

 Mir

Mir is a kimberlite mine which is situated in Russia, Mirny city.
Diameter: 1.2 km
Depth: 525 m

 Great Blue Hole

This hole is situated in Lighthouse reef, 96 km from Belize.
Diameter: 305 m
Depth: 129 m


 Karstic Hole in Guatemala

This hole appeared in the capital of Guatemala as a result of tropic storm Agatha.
Diameter: 20 m
Depth: 150 m