"Give us your body for a week and we'll give you back your mind" is the commitment that St. Lucia's The BodyHoliday makes to its guests. Staying for a month, then, is genius. The spirit of a secluded Caribbean island—home to lush rainforests and their colorful creatures—whispers to the reptilian part of your brain that you are home. Settle in with the two-day Body Renaissance, a...