Bahama Blue (2016)

Hidden away beneath the surface of the Bahamian archipelago is a magical world millions of years in the making. The caves and blue holes of the Bahamas house some of the most spectacularly beautiful geological formations in the world. The species that reside in their watery depths are biological anomalies that thrive in dark waters saturated with hydrogen sulfide gas and low in oxygen. Above ground, the variety of bats and other creatures that make their homes in the caves are astounding.