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.

Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.

Located on the Adriatic, Koper is a coastal port city in Slovenia. Koper is home to a variety of architectural gems dating back centuries, especially near the city's central Tito Square. Koper's marina and beaches provide spectacular views of the Bay of Trieste, while the city's variety of museums, parks, restaurants, and bars offer plenty to explore and entertain.

Located off the coast of West Africa, Cape Verde is an archipelago that is sure to enchant visitors with its unique blend of African and Portuguese influences. This group of ten volcanic islands boasts dramatic landscapes, from the barren, rugged mountains of Fogo Island to the lush, green hills of Santo Antão. With its stunning landscapes, lively culture, and warm hospitality, Cape Verde offers a wide range of activities for all sorts of travelers.

Replete with windmills and old-world charm, the village of Kinderdijk lies east of Rotterdam on the Lek River and is a popular stop for European river cruises. Home to the largest concentration of old windmills in the Netherlands, Kinderdijk was designated a UNESCO World Heritage Site in 1997.