Cagliari is Sardinia's capital and largest city. Several civilizations have left their imprint here architecturally and culturally. Must-sees include the Museo Archeologico Nazionale di Cagliari, with its Roman and Byzantine treasures, as well as Castello, a medieval quarter situated on a hill above the city. The city is also known for its food and vibrant nightlife.

Bordeaux is ready for its close-up! After years of improvements, modern public transportation is in place and the city is gleaming after a wave of restorations. When visiting this lovely destination, be sure to walk across the Garonne River-spanning Stone Bridge (17 arches in all!) and see Place des Quinconces, France's grandest public square.

Located in northern Germany, Hamburg is an important commercial hub on the Elbe River and unique for the expansive system of canals which divide the city in two. Replete with fascinating architecture and scenic waterfront promenades, Hamburg offers plenty to see and explore!

>Slovenia, tucked between the Alps and the Adriatic Sea, is a small country with a strong sense of identity and an impressive variety of landscapes. Its capital, Ljubljana, is known for its walkable center and mix of Baroque, Secessionist, and modern architecture. The Ljubljanica River runs through the city and is lined with open-air cafés and artisan shops.

A tributary of the Rhine, the Moselle River flows through France, Luxembourg and Germany. The Moselle also lends its name to a region of France, a valley which it bisects, and a wine produced along its banks.