Along the banks of the Moselle River, Cochem is a charming village known for Reichsburg castle as well as its old town, with its half-timbered houses.

Eskişehir, located in northwestern Turkey, is a city where old meets new in unexpected ways. Known for its youthful vibe due to its two major universities, the city is also deeply rooted in history. It sits along the Porsuk River, which winds through lively neighborhoods and parks. The riverfront, once mostly industrial, has been transformed into a place where gondolas pass under bridges and locals gather at riverside cafes.

One of the major rivers of the Iberian Peninsula, the Douro in north-central Spain and Portugal just might be the world's most beautiful wine region. Most of the river on the Spanish side isn't navigable, so river cruises generally travel roundtrip from Porto, on the coast of the Atlantic.

Eminently livable and a pleasure to visit, Zurich is Switzerland's largest and most affluent city. This Central European metropolis is an engine of finance and banking, and has much to offer to visitors. There are numerous art museums, fine chocolate stores, and boundless luxury shopping opportunities.

Nestled in the rolling hills of northeast Georgia, Athens is a vibrant city known for its rich history, thriving arts scene, and quintessential Southern charm. Home to the University of Georgia, the birthplace of public higher education in America, Athens brims with youthful energy and intellectual curiosity.