<P> Dean 's Blue Hole is the world 's second deepest known salt water blue hole with an entrance below the sea level . It plunges 202 metres ( 663 ft ) in a bay west of Clarence Town on Long Island , Bahamas . </P>
<P> Dean 's Blue Hole is the world 's second deepest known salt water blue hole with an entrance below the sea level . It plunges 202 metres ( 663 ft ) in a bay west of Clarence Town on Long Island , Bahamas . </P>
dean 's blue hole is one of deepest
dean 's blue hole is one of deepest
salt water blue hole
salt water blue hole