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Blue Holes of Andros
Did you know these ponds connect to the ocean through underground passages?

Blue Holes of Andros (Webisode 36) Back to Webisodes »

Summary

Jonathan travels to Andros, an island in the Bahamas, to investigate underwater caves that start in blue holes. A blue hole looks like a pond, but leads into a vast underwater cave system. In the Bahamas, these caves often lead to the ocean. As Jonathan explores the ocean end of the caves, he learns how the two systems are connected.