Southeast Spain's seaport of Cartagena is a large naval base on the Mediterranean coast. The city was founded in 220 B.C. and boasts Roman ruins, mosaics and murals.

Even though Linköping has developed into an industrial center and is Sweden's fifth-largest city, it maintains a small-town atmosphere. Old Linköping is the restored town center with preserved buildings from the 18th and 19th centuries. The tower of the impressive Linköping Cathedral, which took nearly 300 years to complete, can be seen from a distance of more than 10 kilometers.

Florence is a coastal city in Oregon located where the Siuslaw River meets the Pacific Ocean. It is known for its dramatic coastal scenery, extensive sand dunes, and working waterfront.

The Volga River is an emblematic waterway that meanders through the heart of Russia, offering an exceptional journey through the country’s rich cultural and historical tapestry. As Europe’s longest river, stretching approximately 3,530 kilometers (2,194 miles), the Volga flows from the Valdai Hills to the Caspian Sea, weaving through major cities such as Tver, Nizhny Novgorod, and Volgograd.

The Dordogne River flows from the mountains of Auvergne to Bordeaux through the magnificent French countryside. The valley area named for the river is full of bucolic scenery, dotted with welcoming rural villages, quaint riverside castles, and plenty of opportunities for gourmet meals in true French tradition.