The great blue hole is located off the cost of Belize in Central of America.
A huge underwater sinkhole it is secular in shape and considered to be one of the best diving sports in the world .
The hole formed in the last of ice age when the entire cave system the island had collapsed it is the part of Belize Barrier Reef Reserve System
a UNESCO world heritage site it was once an island and now home to diverse animals fish coral reefs etc .