Bird-watchers, in particular, will enjoy a visit to the uninhabited island of Little Tobago. Boats leave regularly for the 15-minute trip to the island, a 450-acre/182-hectare seabird sanctuary. The snorkeling there is excellent, too—there's always the chance you'll see a manta ray, and it is one of the best spots in the Caribbean to explore a brain coral reef up close. Off the east coast of Tobago, near Speyside (about an hour's drive from Scarborough), Trinidad and Tobago.