U.S. News Insider Tip: If you're scuba diving, make slow, steady movements and exhale steadily to avoid scaring away manta rays. The calmer you are, the closer they'll come. – Chantae Reden Bora ...

Mobydick Tahiti has onboard acoustic systems that let you listen to humpback songs underwater before diving in. Trinidad's beachier and wilder sister island, Tobago is a favorite among scuba divers.