Turkmenistan, natural gas is starting hole found by geologists in 1971, when at that time was digging to find natural gas and then suddenly the ground under its existing quarry disappear abruptly, and left a very big hole, in order avoid poisonous gases which come out of the hole then the hole is burned, and the fire is still burning today
2. Kimberley Diamond Mine
South Africa, also known as the Big Hole reigning excavation using the world's largest human hand. In 1866 up to 1914 as many as 50,000 workers digging with picks and shovels in search of 2.722 kg of diamonds.
3. Monticello Dam
USA, Dam, reply was in Napa County, California with an average yield 48.400 cubic feet per second of water
4. Birmingham Canyon Mine
USA, copper mines are located in the Oquirrh mountains, Utah with into the 1.2 km and width of 4 km is the largest mine ever made by man
5. Great Blue Hole
Belize, located in the waters of Belize with 400 feet into the 1000 feet in diameter, formed since the ice age
6. Mirny Diamond Mine
Unisoviet, mine has a depth of 525 meters with a diameter of 1,200 meters, this mine is now no longer in operation, when the mine was still active wear truck trip takes 2 hours from kedasar soil surface.
7. Diavik Mine
Diavik Mine - Canada, Being in the north of Canada opened in 2003 by producing 1,600 kg per year diamond
8. Sinkhole
Guatemala, The emergence of this hole in the start of 2007, by swallowing dozens of homes and killed 2 people, because of this incident also thousands of residents around it should be in ungsikan. This hole is caused by rain
9. Udachnaya Pipe
Udachnaya Pipe - Russia, is a gem mine plan the mine will cease in 2010, this mine was discovered in 1955 with a depth of 600 meters.
10. Chuquicamata
Chuquicamata - Chile, is the largest copper producing mine in the world with a depth of 850 meters.
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