Bimini's most talked-about underwater formation and its most vibrant reef sit close enough together to share a single guided snorkel. Three Sisters Reef comes first, where coral formations and tropical fish fill the clear water in one of Bimini's most productive stretches for marine life. The Road to Atlantis follows: an underwater rock formation that has attracted scientists, explorers, and skeptics since the 1960s, with guides offering both the local legends and the scientific perspectives that have surrounded it for decades. Whether the formation connects to stories of a lost civilization or simply makes for an unusual snorkel, it remains one of the most compelling sites The Bahamas has to offer.