In the Carribean - Bonaire and Little Cayman. The Red Sea, Coral Sea, and Yap for Manta Rays. Truk Lagoon for WWII ship wrecks. Best in the world? Palau! Most disappointing - Sea of Cortez. Scariest - Great Whites off Simonstown, South Africa. We're booked on PG for Marquesas next year. Hope the body holds together for SCUBA on that trip!