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.

Say aloha to tropical breezes, oceanfront luaus and iconic Diamond Head on Oahu, the most populated Hawaiian island. Follow in the sandprints of surfing forefather Duke Kahanamoku on Waikiki Beach, visit the royal quarters of Iolani Palace and tour Pearl Harbor.

Forested hills, white sand beaches and crystal-clear waters greet visitors to tropical Palau Langkawi, the largest of the 99 islands in Langkawi archipelago.

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.