Great Blue Hole

Outside of Belize, a country in South America, is almost perfectly circular hole with a diameter of 0.4 km. The water depth in this hole -145 m, which gives it a deep blue color. Tourists from all over the world are immersed in the great blue hole of Belize, to admire the amazing species of fish in its clear waters. It is believed that this magnificent geological object was formed billions of years ago, when the water rose above the caves.