The sound of music lures fans both of classical music and of Julie Andrews to Salzburg. Most sights are within walking distance of the city center.

If watching the sunrise from atop a 10,000-foot volcano, swimming under waterfalls, hiking through craters and luxuriating on white-, red- and even black-sand beaches sounds like paradise, then Maui awaits.

This Red Sea resort town on the tip of the Sinai peninsula offers world-class diving with spectacular reefs, magnificent drop-offs and shipwrecks waiting to be explored.

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.