The Bahamas is famous for its relaxed island atmosphere, beautiful beaches, and clear blue waters. At 2,300 sq. miles, Andros is the largest of the Bahamian islands but is also one of the least-developed. It’s home to the world’s third-largest fringing barrier reef and the world’s highest concentration of freshwater blue holes, making it the perfect outdoor classroom for this 8-day Marine Biology STEM tour in the Bahamas.