Glamorous Santorini, in the southern Aegean's Cyclades islands, curves round a giant lagoon, a caldera left by a volcanic eruption.

Relaxing and pristine Kauai (the Garden Island)is the least commercially developed of the Hawaiian islands. Waterfalls, scenic drives and more than 60 beaches dot the landscape.

It's the East Coast's answer to Las Vegas. Atlantic City's casinos draw tourists by the car- and bus-load, but even if your main objective is to play some blackjack, you'll want to save time for sightseeing.

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.