The Great Blue Hole of Belize is a largest underwater sinkhole in the world. It is located at the center of the beautiful Lighthouse Reef Atoll. Circular in shape and characterized by its rich, blue color, it is over 300 meters across and 125 meters deep. Its walls are almost perfectly vertical and fairly smooth, except at a few points where there are large ledges and overhangs. It was formed during several episodes of quaternary glaciation when sea levels were much lower. As the ocean began to rise again, the cave was flooded.
The actual name of ‘The Great Blue Hole’ was created by British diver and author Ned Middleton after having lived in the country for 6 months. People in Belize think it should be one of the seven wonders of the world. In addition to being a spectacular vision to the eye, it has also received world recognition from UNESCO, United Nations Educational Scientific and Cultural Organization. This makes the area well protected.