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.

Located on the southern coast of Finland at the delta of the Kymi river, the city of Kotka is a major Finnish sea port. Perhaps the best-known attraction of this multicultural and creative city is the country's largest urban maritime festival, an annual celebration that includes boating events, dance and music performances, and Finland's largest parade which marks the beginning of the city-wide event.

Hot Springs, Arkansas has been drawing visitors for centuries, and it all starts with the water. The city sits atop a natural thermal spring system that produces nearly a million gallons of 143-degree water each day. These springs gave rise to Bathhouse Row, a stretch of eight historic bathhouses within Hot Springs National Park. Some, like the Fordyce Bathhouse, now serve as museums, while others still offer traditional thermal soaks.

Biarritz, located on the Basque coast of southwestern France, is a glamorous seaside city renowned for its picturesque beaches and rich history. Once a modest fishing village, Biarritz evolved into a luxurious resort destination favored by European royalty in the 19th century.

Nürnberg (Nuremberg), located in the heart of Bavaria, Germany, is a city rich in history, culture, and architectural charm. Known for its medieval old town, Nürnberg boasts cobbled streets, half-timbered houses, and the imposing Nuremberg Castle, which overlooks the city and offers panoramic views.