Planet Earth is beautiful and terrible for its natural and man-made objects. They admire and frightening at the same time. Some of these objects are holes in the ground, some human and some natural origin. All of them have one thing in common — they are almost perfectly round and so beautiful, but when you reflect on the forces, and wounded the planet, is not alone.
1. Diamond mine in Mirny in Yakutia. It is called a man-made monster, located right in the city, unpretentious — Peace. The depth of this hole reaches 525 meters, and diameter — 1,200 meters. Some call mine "the navel of the earth", and there is a rumor that a giant funnel over the no-fly helicopters because they sucked with great force inside. Forty-five years of mine regularly supplies the market with diamonds, the recognized standard of quality and beauty. Architectural bureau "AB Alice" drafted "eco-cities", which will be built in the crater. Eco-city 2020 provides for the construction of a giant city, which can accommodate more than 100,000 people. The construction will be divided into three main levels with living areas and areas for recreation and entertainment. One of the features of the project — to defend the town glass roof covered with solar cells.
2. "Big Hole" Kimberly
in South Africa. The famous Hole Vig is also diamond mine, and developed by hand. People seized about 22 million tons of rock to get just three tons of the precious stone. The quarry closed in 1914, and its present morphology resembles a volcanic crater. The size of a circle is about 1.8 kilometers, and vertical walls are falling to a depth of 1,200 meters. Underground water filled crater half, but that does not stop tourists admire its grandeur.
3. Funnel Monticello Dam,
Napa, California, USA. The queen of all man-made craters, the embodiment of cosmic black hole. We are talking about a huge circular spillway water, which is called the "Black Hole", it is so seen by pilots from the air. In reality, this is just a giant pipe diameter of 22 meters to control the level of water about the dam. The flaps open in the rainy season to lose the excess amount of water and to avoid damage to the dam body. Velocity of the water in the crater — about 1370 cubic meters per second. Construction of the dam was completed in 1957. This arched structure with a height of 93 meters and a length of 312 meters. And, as you might guess, a swim in the reservoir when the funnel is open, smoking — suck.
4. Bingeym Canyon
in Utah, USA. The largest active mining mine open for mining copper, molybdenum, gold and silver. Located near the city of Salt Lake City. Has the honorary title of the largest man-made excavation. Development profile began in 1863 and continues to this day because of high performance. Produced more than 17 million tons of copper, 652 tons of gold and 5,386 tons of silver. This pit depth of 1,200 meters and a width of 4,000 meters, in 1966, was declared a national historical heritage of the United States and became a place of pilgrimage tourism. Here undeveloped viewing platform from which you can watch below boiling work.
5. The Great Blue Hole
— Literally "Great Blue Hole", a place that has become a cult thanks to the famous Jacques Yves Cousteau, who included it in the top ten best places for diving. This amazing circular coral cave has more than 300 meters wide and 145 meters deep, its size allows it to consider the largest known cave on earth. It is located in the Caribbean Sea, 100 miles from Belize City. The richness of the underwater world of coral reefs and stunning clarity of water, along with the unusual shape made The Great Blue Hole diving mecca.
6. Abyss Sarisarinyama,
Venezuela. These strange round holes located on a plateau at an altitude of 2300 meters above sea level in the southern part of Venezuela (Bolivar State) and are known as the mysterious failures Sarisarinyama. Have a diameter of about 350 meters, and of unknown origin. Some of the holes have not only perfectly correct form, but their depth is strangely coincides with the diameter. One of the theories of the formation of these failures points to the erosion of underground rivers, in some places washed away sandstone. The region is known for some of Venezuela's endemic plants and animals, which reflects its long isolation. "The Lost World" today is not available to ordinary tourists.
7. Meteor Crater Berringer,
Arizona, USA. Some meteorites fallen to the ground, like Tunguska, leaving no craters. But here Berringer Crater perfectly preserved and has a "moon" shape. He is a huge trough of 1200 meters wide and 200 meters deep. The meteorite was about 30 meters wide and weighing about 100 tons and hit the earth's surface about 50 thousand years ago. He was big enough to form a clear-cut an impressive crater, and small enough to wipe out the region.
8. Karst failure in Guatemala.
The failure of the soil with a diameter of 30 meters and a depth of about 60 meters consumed a dozen buildings in Guatemala City in the country of the same name. The tragedy occurred in July 2010, after the passage of tropical storm Agatha. In the "jaws of the devil" killed two people. Geologists explain the unusual circular shape of the failure of the karst underground caves. The soil in this place is rich in limestone, salts that are readily soluble in water. Such failures are characteristic of the southern U.S. and Central America, but the size and perfectly round eclipsed the others.