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.

Mesa is a city in Maricopa County in the East Valley of the Phoenix metropolitan area, set against the Sonoran Desert and the lower slopes of the Superstition Mountains. Its landscape combines developed neighborhoods with desert parks, citrus groves, canals, and broad mountain views. Mesa has grown into one of Arizona’s larger cities while retaining connections to agriculture and the Salt River Valley.

Cobh, a colorful harbor town in County Cork, holds a unique place in Irish history and maritime heritage. Once known as Queenstown, it was the final port of call for the Titanic in 1912. Today, the Titanic Experience Cobh offers visitors a chance to step into the footsteps of the 123 passengers who boarded that day. Located in the original White Star Line ticket office, the museum tells personal stories of those who left from this very spot, blending interactive exhibits with original artifacts.

Kos, an enchanting island in Greece’s Dodecanese archipelago, is a gem steeped in both history and natural beauty. Known as the birthplace of Hippocrates, the father of modern medicine, Kos is home to the ancient Asclepeion, a healing temple where Hippocrates taught his students. Visitors can wander through the well-preserved ruins and enjoy sweeping views over the island and the Aegean Sea.

Sognefjord stretches over 200 kilometers into Norway’s mountainous interior, making it the country’s longest and deepest fjord.