A perfect hole from the top view, this great Blue Hole in Belize is indeed an attraction. Just like a hole created by a diamond core bit, this famed Blue Hole is a perfectly circular limestone sinkhole more than 300 feet across and 412 feet deep. Tourist particularly divers frequents this site for an opportunity to discover and experience this famous geographical marvel. During the ice age, this was believed to be an opening of a vertical cave but now it is considered as diving magnet for extreme divers. The Blue Hole boasts of its crystal-clear blue waters and its myriad species of marine life such as the Caribbean sharks, tropical fish and spectacular coral formations. Today, this great geographical phenomenon is also considered as the world’s largest natural formation of its kind.