No matter how much we have traveled or traveled the world , how much Internet or general culture blogs have visited , the nature is saved thousands of wonderful places and secrets reserved for . Some are famous and commercially exploited as the Iguazu Falls . Others, such as the Blue Hole, that we present today , remains a mystery to most people .A blue holeis an underwater cave or sink . They are also called vertical caves . Blue holes are roughly circular , steep-walled, and named for the dramatic contrast between the dark blue of the deep water and the lighter blue of the shallows around them . Water circulation is poor, and its waters are commonly anoxic below a certain depth and this environment is unfavorable for most sea life , but life can allow a large number of bacteria. The deepest blue hole in the world is the Blue Hole Dean with a depth of 202 meters. It is situated in a bay west of Clarence Town on Long Island, in the Bahamas.
Blue holes formed during past ice ages , when sea level was about 100-150 meters lower than today. At that time , these formations were subject to chemical weathering common in all limestone -rich soils , which ended once immersed at the end of the ice age . Blue holes typically found in carbonate platforms shallow .
One of the most famous in the world is the Great Blue Hole off the coast of Belize . It is located near the center of Lighthouse Reef , a small atoll located 100 kilometers from the mainland and Belize City. The hole is circular in shape , and has more than 300 meters wide and 123 meters deep. As the ocean began to rise again , the caves were flooded , and the roof collapsed . Is believed to be the world's biggest phenomenon of its kind, the Great Blue Hole is part of the System of Reserves Belize Barrier Reef , World Heritage United Nations Educational , Scientific and Cultural Organization ( UNESCO) . It's a great place for diving but is for advanced people who do not fear the presence of sharks ! If some brave soul wants to try it , please contact: www.aquascubabelize.com
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