Grand Cayman's splashier side is the real draw. Offering a host of experiences, from petting attention- and food-seeking stingrays at Stingray City to exploring jaw-dropping drop-offs and dive sites, Grand Cayman is a watery wonderland.

Stunning coral reefs and turquoise waters perfect for windsurfing have made Hurghada, on Egypt's Red Sea Coast, a busy resort town.

Historic and modern, European and Asian — that's Istanbul. The city at the junction of two continents is home to ancient structures like the Hagia Sophia and the Blue Mosque in the Old City, as well as modern businesses, hotels, restaurants and nightlife in the New City.

South Beach, or SoBe, is Miami Beach's buzziest bit. The vibrant area, with its pastel-hued buildings, hip nightclubs, trendy shops and see-and-be-seen restaurants, attracts socialites and their satellites year-round.