Coimbra, set along the banks of the Mondego River in central Portugal, is a historic city known for its academic legacy and old-world charm. Once the medieval capital of Portugal, it is home to the University of Coimbra, one of the oldest in Europe and a UNESCO World Heritage Site.

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.

A series of gates surrounds the two centers of ancient, medieval Fez (sometimes spelled Fes). The principal axes link the center to the gates and a street surrounds the heart of the old city. The Kairouan quarter, which is longer, is crossed by an artery. Narrow, tortuous pedestrian streets, covered passages, stairs and numerous dead-ends make up the dense layout with few urban squares.

La Rioja, located in northern Spain, is best known for its wine, but the region offers much more than vineyard views. Its capital, Logroño, sits along the Camino de Santiago and has welcomed travelers for centuries. The city’s historic center is compact and lively, with narrow streets lined by centuries-old churches, pintxo bars, and quiet plazas.

Cuernavaca, often called the “City of Eternal Spring,” has long been a retreat for those seeking warm weather and relaxing surroundings just 90 minutes from Mexico City. With a history that stretches back to the Aztec empire, the city is layered with centuries of cultural change. The historic center of Cuernavaca combines architecture from multiple eras, with narrow streets leading to quiet plazas and colonial churches.