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.

Holyhead, a charming port town located on the Isle of Anglesey in Wales, serves as a gateway to the stunning landscapes of North Wales and beyond. Known for its bustling ferry terminal, Holyhead connects Wales with Ireland, making it a convenient starting point for cross-border travel.

Lithuania offers visitors a chance to explore a country where medieval traditions and modern culture meet. Vilnius, the capital, is known for its well-preserved Old Town, a UNESCO World Heritage site filled with winding streets, baroque churches, and cozy squares. Visitors can climb the hill to Gediminas’ Tower for a sweeping view of the city, or visit the Gates of Dawn, an important religious and historical monument that has welcomed travelers for centuries.

Marrakesh, a vibrant jewel in the heart of Morocco, is a city where ancient traditions blend seamlessly with modern allure. Known as the "Red City" for its rose-hued buildings and walls, Marrakesh offers a sensory experience unlike any other. The city’s medina, a UNESCO World Heritage Site, is a labyrinth of narrow alleyways, bustling souks, and hidden courtyards.

Argentina shares half of this island territory in the South Atlantic Ocean with Chile. It's a place of oil derricks, sheep, glaciers, wind and waterways. Ushuaia and Río Grande are the two main towns; awesome scenery, wild walks and fishing are the island's main attractions. Argentina's only coastal national park comprises rivers, lakes, forests and glaciers, with great trekking and wildlife-spotting opportunities.