Great Blue Hole is a large underwater hole located on the coast of Belize. The Blue Holes are basically a huge cave network gateway. Belize's Barrier Reef Reserve System is located, about 60 miles away from Belize City.
It is believed to be the world's largest sea hole. Its circular circular diameter, 300 meters (984 feet) in diameter and 124 meters (407 feet) deep. It is believed that 65,000 years ago when the ice was reigning in the world for the last time, all the water in the world was accumulated in the polar regions. The sea level was so much lower than now.
At Belize, the sea level was more than 150 meters below now. Then the stones of the calcium carbonate substance are formed. And the rock is created by the huge structure of the cave But when the snow started to melted again, the sea level began to grow.
The structure that drowns under water About 10,000 years ago, the whole cave network was completely submerged under water. And then the stones of some places were broken down, these blue holes were created.
