The Great Blue Hole is a giant circular sinkhole in the Caribbean Sea, near Belize.It was formed by the collapse of a limestone cave system during the last ice age, when sea level was much lower.t is over 300 meters wide and 125 meters deep, making it the largest natural formation of its kind in the world.It is a popular diving spot, attracting divers who want to explore its crystal-clear waters and diverse marine life.In 2018, a submarine expedition revealed what lies at the bottom of the hole: stalactites, ancient fossils, and a layer of toxic hydrogen sulfide.he Great Blue Hole is a geological wonder that offers a glimpse into the past and the mysteries of the deep.
The Great Blue Hole is a giant marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circula..
