Coursing through 10 countries, the Danube is the second-longest river in Europe. This waterway, lined with fortresses and castles, rises in Germany's Black Forest and runs for 1,770 miles to the Black Sea. The Danube is an essential commercial thoroughfare for central and southeastern Europe, and several river cruise companies sail vessels on it year-round. Destinations along this river include Vienna, Budapest, Passau and Bratislava.

Baiona is a coastal town in Galicia, Spain, located along the Atlantic Ocean in the province of Pontevedra. It sits at the entrance of the Ría de Vigo, with a historic harbor that has long connected it to maritime activity. The town is known for its seafront setting, where fishing traditions and tourism exist side by side.

Nestled in the foothills of the Black Forest, Baden-Baden is Germany's ultimate spa destination, famous for its luxurious thermal baths and charming Belle Époque architecture. This elegant town, whose name literally translates to "Baths of Baden," has attracted visitors seeking relaxation and rejuvenation for centuries.

Catania, nestled on the eastern coast of Sicily, is a city shaped by fire and stone. Built from the black lava of Mount Etna, it’s a landscape filled with energy and contrasts from its Baroque palaces to its open air fish markets. At the heart of the city stands the Piazza del Duomo, where the iconic Fontana dell’Elefante, which is carved from volcanic rock, greets every visitor who passes by.

Tomar sits on the Nabão River in central Portugal as a place where medieval history and everyday life meet in welcoming streets and grand monuments. Just outside the convent walls lies the Pegões Aqueduct, an impressive feat of engineering more than 6 kilometers long that once carried water from distant springs to the hilltop site. Some sections of its arches rise more than 30 meters above the valley floor, making it a striking backdrop for photos.