Want to play castaway for a day? From the Caribbean to California, these nine islands offer pristine beaches and abundant wildlife.
Be sure to: Suit up in your scuba gear and spend hours exploring the still-intact hull of the sunken 1886 schooner Lucerne.
How to get there: Via private boat or with Adventure Vacations water taxi service (requires advance notice); 715/747-2100 or adv-vac.com. For diving information, contact the Apostle Islands National Lakeshore; 715/779-3397 or nps.gov/apis.