Just off the coast of Belize, Cayo Espanto offers all the perks of a private island without actually having to own it. The resort consists of just seven villas, each situated so that guests will feel like they're the only ones around. They range from one-bedroom beachfront to an overwater bungalow with a glass-bottom floor. Regardless of your choice, every villa includes its own plunge pool, private dock with lounge chairs, and a strip of white-sand beach. A custom menu is crafted specifically to each guest by the on-site chefs and is served in your own dining room or veranda. Along with a spa, the island also hosts some of the best snorkeling and scuba diving thanks to the world's second largest barrier reef.