Blue hole exploration in The Bahamas is an adventure that should be experienced. The islands of The Bahamas are filled with a variety or inland and ocean blue holes. Blue holes are water circular opening that is said to connect to open water. Locals kids use these phenomena as freshwater swimming pools. Sapphire Blue Hole is an inland blue hole that captivates the beauty of the different blue holes exudes. The best part is diving into the cool swimming hole.