😎 Save for your next Bahamas Trip! Blue holes in The Bahamas are vertical sinkholes and flooded limestone caves. Some open to the ocean and breathe with the tides. Others are inland with layered water chemistry that creates a visible halocline and oxygen-poor zones deeper down. Andros has the highest concentration in the world and protects many inside Blue Holes National Park. 📍 Where travelers can see them: Andros for inland and ocean blue holes inside a 40,000-acre park. Long Island for Dean