7 Nights Europe, Mediterranean

The capital of Catalonia boasts the bustle of the world's busiest seaport, the medieval romance of its Gothic Quarter, and a feast of Catalan Art Nouveau buildings - including the great creations of Antonio Gaudí. The "Great Enchantress" remains one of the most exhilarating cities in Europe, decorated with the grandeur of Picasso, Miró and Dalí.

The Strait of Messina is a narrow strait between the eastern tip of Sicily and the western tip of Calabria in the south of Italy. It connects the Tyrrhenian Sea to the north with the Ionian Sea to the south, within the central Mediterranean

This Sicilian port city is noted for the Duomo, an elegant reconstruction of the medieval cathedral built by Roger II, and the detached campanile, which contains the largest astronomical clock in the world. Ruins salvaged from past natural disasters are housed in the Museo Regionale.

Greece's capital and its largest city was born atop the Acropolis, where ancient warrior-kings once dwelled. These ruins are a testament to the golden age of Greece, and the Parthenon is considered the most architecturally sophisticated temples of its time. Ancient Agora, a sprawling array of stones, slabs and foundations, was once the focal point of ancient Greek life.

The Mississippi River is the second-longest river and chief river of the second-largest drainage system on the North American continent, second only to the Hudson Bay drainage system.

Once called Constantinople, the former capital of the Byzantine Empire is the only city in the world to straddle two continents - Europe and Asia. Its old palaces, great mosques with soaring minarets, ancient churches, museums, bazaars, and the Istanbul Strait are all worth seeing. The Grand Bazaar, the Hagia Sophia, the Blue Mosque and the Topkapi Palace are impressive, unforgettable sites.

Once called Constantinople, the former capital of the Byzantine Empire is the only city in the world to straddle two continents - Europe and Asia. Its old palaces, great mosques with soaring minarets, ancient churches, museums, bazaars, and the Istanbul Strait are all worth seeing. The Grand Bazaar, the Hagia Sophia, the Blue Mosque and the Topkapi Palace are impressive, unforgettable sites.