On-site secret: Swim slowly and stay calm and you may enjoy a manatee encounter for 15 minutes or more. Keep an eye out for: a whiskery face nuzzle, a flipper hug, and a full-body rub. Though the manatee defines your interaction, they can be very sociable.
When to go: all year. In winter there are more manatees, but in summer there are fewer crowds; 800/291-3483 or americanprodive.com.